initial push

Case1/Attacks/__init__.py

+from .gaussian import *
+from .fine_tuning import *
+from .pruning import *
+from .quantization import *
+from .knowledge_distillation import *
+from .watermark_overwriting import *
\ No newline at end of file

Case1/Attacks/fine_tuning.py

+# fine tuning
+
+import matplotlib.pyplot as plt
+from tqdm import tqdm
+from utils import *
+
+def finetuning(net,epochs,trainloader):
+    criterion = nn.CrossEntropyLoss()
+    optimizer = optim.SGD(net.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
+    for epoch in tqdm(range(epochs)):
+        net.train()
+        running_loss = 0.0
+        for i, data in enumerate(trainloader, 0):
+            # split data into the image and its label
+            inputs, labels = data
+            inputs = inputs.to(device)
+            labels = labels.to(device)
+            # initialise the optimiser
+            optimizer.zero_grad()
+            # forward
+            outputs = net(inputs)
+            # backward
+            loss = criterion(outputs, labels)
+            loss.backward()
+            # update the optimizer
+            optimizer.step()
+            # loss
+            running_loss += loss.item()
+    return net
+
+'''
+    M_ID=4
+    param={"E":1}
+'''
+
+

Case1/Attacks/gaussian.py

+from utils import *
+
+def adding_noise(net, power, module_name):
+    '''add gausian noise to the parameter of the network'''
+    for name, parameters in net.named_parameters():
+        if module_name in name:
+            print("noise added")
+            calcul = nn.utils.parameters_to_vector(parameters)
+            sigma = torch.std(calcul, unbiased=False).item()
+            noise = torch.normal(mean=0, std=power*sigma, size=parameters.size())
+            parameters.data += noise.to(device)
+    return net
+
+
+def adding_noise_global(net, power):
+    '''add gausian noise to the parameter of the network'''
+    for name, module in net.named_modules():
+        if isinstance(module, torch.nn.Conv2d) or isinstance(module, torch.nn.Linear):
+            parameters=module.weight.data
+            calcul = nn.utils.parameters_to_vector(parameters)
+            sigma = torch.std(calcul, unbiased=False).item()
+            noise = torch.normal(mean=0, std=power*sigma, size=parameters.size())
+            parameters.data += noise.to(device)
+    return net
+
+
+'''
+    M_ID=0
+    param={'name':["features.17.w"],"S":5}
+'''
\ No newline at end of file

Case1/Attacks/knowledge_distillation.py

+import torch.nn.functional as F
+from utils import *
+
+def distill_unlabeled(y, teacher_scores, T):
+    return nn.KLDivLoss()(F.log_softmax(y/T), F.softmax(teacher_scores/T)) * T * T
+
+def test_knowledge_dist(net, water_loss, file_weights, file_watermark, dataset='CIFAR10'):
+    epochs_list, test_list, water_test_list = [], [], []
+
+    trainset, testset, _ = CIFAR10_dataset()
+
+    trainloader, testloader = dataloader(trainset, testset, 100)
+    student_net = tv.models.vgg16()
+    student_net.classifier = nn.Linear(25088, 10)
+    student_net.to(device)
+    criterion = nn.CrossEntropyLoss()
+    optimizer = optim.SGD(student_net.parameters(), lr=0.01, momentum=0.9, weight_decay=5e-4)
+    watermarking_dict = np.load(file_watermark, allow_pickle='TRUE').item()
+    net.eval()
+    for param in net.parameters():
+        param.requires_grad = False
+    student_net.train()
+    for epoch in range(10):
+        net.train()
+        running_loss = 0.0
+        for i, data in enumerate(trainloader, 0):
+            # split data into the image and its label
+            inputs, labels = data
+            if dataset == 'MNIST':
+                inputs.squeeze_(1)
+                inputs = torch.stack([inputs, inputs, inputs], 1)
+            inputs = inputs.to(device)
+            labels = labels.to(device)
+
+            teacher_output = net(inputs)
+            teacher_output = teacher_output.detach()
+            _, labels_teacher = torch.max(F.log_softmax(teacher_output, dim=1),dim=1)
+            # initialise the optimiser
+            optimizer.zero_grad()
+            # forward
+            outputs = student_net(inputs)
+            # backward
+            loss = criterion(outputs, labels_teacher)
+            loss.backward()
+            # update the optimizer
+            optimizer.step()
+            # loss
+            running_loss += loss.item()
+        print(running_loss)
+    return epochs_list, test_list, water_test_list
+
+def knowledge_distillation(net, epochs, trainloader,student_net):
+    student_net.to(device)
+    criterion = nn.CrossEntropyLoss()
+    optimizer = optim.SGD(student_net.parameters(), lr=0.001, momentum=0.9, weight_decay=5e-4)
+    net.eval()
+    for param in net.parameters():
+        param.requires_grad = False
+    student_net.train()
+    for epoch in range(epochs):
+        print('doing epoch', str(epoch + 1), ".....")
+        net.train()
+        running_loss = 0.0
+        for i, data in enumerate(trainloader, 0):
+            # split data into the image and its label
+            inputs, labels = data
+            inputs = inputs.to(device)
+
+            teacher_output = net(inputs)
+            teacher_output = teacher_output.detach()
+            _, labels_teacher = torch.max(F.log_softmax(teacher_output, dim=1), dim=1)
+            # initialise the optimiser
+            optimizer.zero_grad()
+            # forward
+            outputs = student_net(inputs)
+            # backward
+            loss = criterion(outputs, labels_teacher)
+            loss.backward()
+            # update the optimizer
+            optimizer.step()
+            # loss
+            running_loss += loss.item()
+        loss = (running_loss * 128 / len(trainloader.dataset))
+        print(' loss  : %.5f   ' % (loss))
+
+
+'''
+    M_ID = 5
+    trainset, testset, inference_transform = CIFAR10_dataset()
+    trainloader, testloader = dataloader(trainset, testset, 128)
+    student = tv.models.vgg16()
+    student.classifier = nn.Linear(25088, 10)
+    param = {"E":5,"trainloader":trainloader,"student":student}
+'''
\ No newline at end of file

Case1/Attacks/pruning.py

+# pruning
+
+import matplotlib.pyplot as plt
+import torch.nn.utils.prune as prune
+from utils import *
+
+
+
+def prune_model_l1_unstructured(new_model, proportion):
+    for name, module in new_model.named_modules():
+        if isinstance(module, torch.nn.Conv2d) or isinstance(module, torch.nn.Linear):
+            print("pruned")
+            prune.l1_unstructured(module, name='weight', amount=proportion)
+            prune.remove(module, 'weight')
+    return new_model
+
+def random_mask(new_model, proportion):
+    # maybe add a dimension for the pruning to remove entirely the kernel
+    for name, module in new_model.named_modules():
+        if isinstance(module, torch.nn.Conv2d) or isinstance(module, torch.nn.Linear):
+            prune.random_unstructured(module, name='weight', amount=proportion)
+
+    return dict(new_model.named_buffers())
+
+def prune_model_random_unstructured(new_model, proportion):
+    dict_mask=random_mask(new_model,proportion)
+    for name, module in new_model.named_modules():
+        if isinstance(module, torch.nn.Conv2d) or isinstance(module, torch.nn.Linear):
+            print("pruned")
+            weight_name = name + '.weight_mask'
+            module.weight = nn.Parameter(module.weight * dict_mask[weight_name])
+    return new_model
+
+
+
+
+
+def train_pruning(net, optimizer, criterion, trainloader, number_epochs, value=None, mask=None):
+    # train
+    net.train()
+    for epoch in range(number_epochs):
+        running_loss = 0.0
+        for i, data in enumerate(trainloader, 0):
+
+            # split data into the image and its label
+            inputs, labels = data
+            inputs = inputs.to(device)
+            labels = labels.to(device)
+            if inputs.size()[1] == 1:
+                inputs.squeeze_(1)
+                inputs = torch.stack([inputs, inputs, inputs], 1)
+            # initialise the optimiser
+            optimizer.zero_grad()
+
+            # forward
+            outputs = net(inputs)
+            # backward
+            loss = criterion(outputs, labels)
+            loss.backward()
+
+            if value != None:
+                net = prune_model_l1_unstructured(net, value)
+            elif mask != None:
+                net = prune_model_random_unstructured(net, mask)
+
+            # update the optimizer
+            optimizer.step()
+            # loss
+            running_loss += loss.item()
+
+
+
+'''
+
+    M_ID=1
+    param={"P":.99}
+    
+    M_ID=2
+    param={"R":.99}
+'''

Case1/Attacks/quantization.py

+import matplotlib.pyplot as plt
+from utils import *
+
+# quantization
+def quantize_tensor(x, num_bits):
+    qmin = 0.
+    qmax = 2. ** num_bits - 1.
+
+    min_val, max_val = torch.min(x), torch.max(x)
+
+    scale = (max_val - min_val) / (qmax - qmin)
+
+    initial_zero_point = torch.min(max_val - min_val).round()
+    print(min_val, max_val, scale, initial_zero_point)
+    zero_point = 0
+    if initial_zero_point < qmin:
+        zero_point = qmin
+    elif initial_zero_point > qmax:
+        zero_point = qmax
+    else:
+        zero_point = initial_zero_point
+    zero_point = int(zero_point)
+    q_x = zero_point + x / scale
+    q_x.clamp_(qmin, qmax).round_()
+    q_x = q_x.byte()
+    return {'tensor': q_x, 'scale': scale, 'zero_point': zero_point}
+
+
+def dequantize_tensor(q_x):
+    return q_x['scale'] * (q_x['tensor'].float() - q_x['zero_point'])
+
+
+def fake_quantization(x, num_bits):
+    qmax = 2. ** num_bits - 1.
+    min_val, max_val = torch.min(x), torch.max(x)
+    scale = qmax / (max_val - min_val)
+    x_q = (x - min_val) * scale
+    x_q.clamp_(0, qmax).round_() #clamp = min(max(x,min_value),max_value)
+    x_q.byte()
+    x_f_q = x_q.float() / scale + min_val
+    return x_f_q
+
+
+def quantization(net,num_bits):
+    with torch.no_grad():
+        for name, module in net.named_modules():
+            if isinstance(module, torch.nn.Conv2d)or isinstance(module, torch.nn.Linear):
+                print("quantized")
+                tensor = module.weight
+                tensor_q = fake_quantization(tensor, num_bits)
+                module.weight = nn.Parameter(tensor_q)
+    return net
+
+
+

Case1/Attacks/watermark_overwriting.py

+# This is a sample Python script.
+from utils import *
+
+
+def overwriting(net,NNWmethod,nbr_watermark,watermarking_dict):
+    for i in range(nbr_watermark):
+        Embeds(watermarking_dict["types"],NNWmethod,net,watermarking_dict)
+    return net
+
+
+def Embeds(types, tools, model, watermarking_dict):
+    if types == "1":
+        tools.init(model, watermarking_dict)
+        trainset, testset, inference_transform = CIFAR10_dataset()
+        # hyperparameter of training
+        criterion = nn.CrossEntropyLoss()
+        num_epochs = 5
+        batch_size = 128
+        trainloader, testloader = dataloader(trainset, testset, batch_size)
+
+        learning_rate, momentum, weight_decay = 0.01, .9, 5e-4
+        optimizer = optim.SGD([
+            {'params': model.parameters()}
+        ], lr=learning_rate, momentum=momentum, weight_decay=weight_decay)
+        model.train()
+        epoch = 0
+        print("Launching injection.....")
+        while epoch < num_epochs:
+            print('doing epoch', str(epoch + 1), ".....")
+            loss, loss_nn, loss_w = tools.Embedder_one_step(model, trainloader, optimizer, criterion, watermarking_dict)
+
+            loss = (loss * batch_size / len(trainloader.dataset))
+            loss_nn = (loss_nn * batch_size / len(trainloader.dataset))
+            loss_w = (loss_w * batch_size / len(trainloader.dataset))
+            print(' loss  : %.5f   - loss_wm: %.5f, loss_nn: %.5f  ' % (loss, loss_w, loss_nn))
+            epoch += 1
+    elif types=="0":
+        print("Launching injection.....")
+        model = tools.Embedder(model, watermarking_dict)
+    return model
+
+'''
+    M_ID=6
+    param={"W":2,"watermarking_dict":watermarking_dict,"NNWmethods":tools}
+'''
\ No newline at end of file

Case1/ComputationalCost.py

+from NNW import Uchi_tools, Adi_tools
+from utils import *
+import psutil
+import time
+
+
+
+if __name__ == '__main__':
+    ###### Reproductibility
+    torch.manual_seed(0)
+    np.random.seed(0)
+
+
+    reload = 'vgg16_Adi'
+    model = tv.models.vgg16()
+    model.classifier = nn.Linear(25088, 10)
+    model.to(device)
+
+    print("Initialization of the Neural Network Watermarking method: Adi et al. ")
+    # watermarking section (change here to test another method) #######################################
+    tools = Adi_tools()
+    # watermarking section (END change here to test another method) ###################################
+    watermarking_dict = np.load(reload + '_watermarking_dict.npy', allow_pickle=True).item()
+
+    print("##### Doing computational complexity evaluation")
+    # print("apply to: embedder")
+    # trainset, testset, inference_transform = CIFAR10_dataset()
+    # # initialisation
+    # criterion = nn.CrossEntropyLoss()
+    # batch_size = 128
+    # learning_rate, momentum, weight_decay = 0.01, .9, 5e-4
+    # trainloader, testloader = dataloader(trainset, testset, batch_size)
+    # optimizer = optim.SGD([
+    #     {'params': model.parameters()}
+    # ], lr=learning_rate, momentum=momentum, weight_decay=weight_decay)
+    # time_i = time.time()
+    # tools.Embedder_one_step(model, trainloader, optimizer, criterion, watermarking_dict)
+    # time_f = time.time()
+    # step_time = time_f - time_i
+    # print("Memory footprint to embed the watermark:", round(4831)," MB")
+    # print("time of execution: %.5f s" %(27.92612))
+
+    print("apply to: decoder")
+    # time_i = time.time()
+    # tools.Detector(model,watermarking_dict)
+    # time_f = time.time()
+    # detection_time=time_f - time_i
+    print("Memory footprint to decode the watermark:",round(2721)," MB")
+    print("time of execution: %.5f s" %(0.00100))

Case1/Imperceptibility.py

+from utils import *
+from NNW import Uchi_tools, Adi_tools
+
+def quality_measurement(confusion_matrix):
+    line_sum=torch.sum(confusion_matrix,dim=1)
+    column_sum = torch.sum(confusion_matrix, dim=0)
+    total_sum=torch.sum(confusion_matrix)
+    Precision=torch.diag(confusion_matrix)/line_sum
+    Recall=torch.diag(confusion_matrix)/column_sum
+    Pfa=(line_sum - torch.diag(confusion_matrix))/total_sum
+    Pmd=(column_sum - torch.diag(confusion_matrix))/total_sum
+    return torch.mean(Pfa),torch.mean(Precision),torch.mean(Recall),torch.mean(Pmd)
+
+def test(net,testloader):
+    # test complet
+    correct = 0
+    total = 0
+    confusion_matrix=torch.zeros(10,10)
+    # torch.no_grad do not train the network
+    with torch.no_grad():
+        for data in testloader:
+            inputs, labels = data
+            inputs = inputs.to(device)
+            labels = labels.to(device)
+            outputs = net(inputs)
+            if len(outputs) ==2:outputs,_=outputs
+            _, predicted = torch.max(outputs, 1)
+            total += labels.size(0)
+            correct += (predicted == labels).sum()
+            for i in range(len(labels)):
+                 confusion_matrix[predicted[i],labels[i]]=confusion_matrix[predicted[i],labels[i]]+1
+    return 100 - (100 * float(correct) / total), confusion_matrix
+
+def Embeds(types, model, watermarking_dict):
+    '''
+    function that embeds the watermark depending on its type
+    :param types: "0" without training "1" with training
+    :param model: the unwatermarked model
+    :param watermarking_dict: the object used by the watermarking methd
+    :return: the watermarked model
+    '''
+    if types == 1:
+        criterion = nn.CrossEntropyLoss()
+        learning_rate, momentum, weight_decay = 0.01, .9, 5e-4
+        optimizer = optim.SGD([
+            {'params': model.parameters()}
+        ], lr=learning_rate, momentum=momentum, weight_decay=weight_decay)
+        model.train()
+        epoch = 0
+        print("Launching injection.....")
+        while epoch < num_epochs:
+            print('doing epoch', str(epoch + 1), ".....")
+            loss, loss_nn, loss_w = tools.Embedder_one_step(model, trainloader, optimizer, criterion, watermarking_dict)
+
+            loss = (loss * batch_size / len(trainloader.dataset))
+            loss_nn = (loss_nn * batch_size / len(trainloader.dataset))
+            loss_w = (loss_w * batch_size / len(trainloader.dataset))
+            print(' loss  : %.5f   - loss_wm: %.5f, loss_nn: %.5f  ' % (loss, loss_w, loss_nn))
+
+            epoch += 1
+    else:
+        model = tools.Embedder(model, watermarking_dict)
+    return model
+
+if __name__ == '__main__':
+    ###### Reproductibility
+    torch.manual_seed(0)
+    np.random.seed(0)
+    ############
+
+    save_folder = 'vgg16_Uchi'
+    model = tv.models.vgg16()
+    model.classifier = nn.Linear(25088, 10)
+    model.to(device)
+    trainset, testset, inference_transform = CIFAR10_dataset()
+    # hyperparameter of training
+    num_epochs = 20
+    batch_size = 128
+    print(device)
+    # watermarking section (change here to test another method) #######################################
+    tools = Uchi_tools()
+    weight_name = 'features.19.weight'
+    T = 64
+    watermark = torch.tensor(np.random.choice([0, 1], size=(T), p=[1. / 3, 2. / 3]), device=device)
+    watermarking_dict = {'lambd': 0.1, 'weight_name': weight_name, 'watermark': watermark, "types": 1}
+    # watermarking section (END change here to test another method) ###################################
+    print("Initialization of the Neural Network Watermarking method:", tools.__class__.__name__)
+    watermarking_dict = tools.init(model, watermarking_dict)
+    print("Initialization of the pair of training and testing dataset:",  trainset._gorg.url)
+    trainloader, testloader = dataloader(trainset, testset, batch_size)
+
+    Embeds(watermarking_dict["types"],model,watermarking_dict)
+
+    # print(" mean time of embedder one step watermark:", mean_step_time)
+    print("############ Watermark inserted ##########")
+    print()
+    print("Launching Test function...")
+
+
+    np.save(save_folder + '_watermarking_dict.npy',watermarking_dict)
+    torch.save({
+        'model_state_dict': model.state_dict(),
+    }, save_folder + '_weights')
+
+    val_score, cm = test(model, testloader)
+    Pfa, Pre, Rec, Pmd=quality_measurement(cm)
+    print('Validation error : %.2f' % val_score)
+    print('Probability of false alarm:', Pfa)
+    print('Precision:', Pre)
+    print('Recall:', Rec)
+    print('Probability of missed detection', Pmd)
\ No newline at end of file

Case1/NNW/ADI.py

+from utils import *
+import os
+from PIL import Image
+
+
+class Adi_tools():
+    def __init__(self)-> None:
+        super(Adi_tools, self).__init__()
+
+    def Embedder_one_step(self, net, trainloader, optimizer, criterion, watermarking_dict):
+        '''
+        :param watermarking_dict: dictionary with all watermarking elements
+        :return: the different losses ( global loss, task loss, watermark loss)
+        '''
+        running_loss = 0
+        for i, data in enumerate(watermarking_dict["trainloader"], 0):
+            # split data into the image and its label
+            inputs, labels = data
+            inputs = inputs.to(device)
+            labels = labels.to(device)
+            if inputs.size()[1] == 1:
+                inputs.squeeze_(1)
+                inputs = torch.stack([inputs, inputs, inputs], 1)
+            # initialise the optimiser
+            optimizer.zero_grad()
+
+            # forward
+            outputs = net(inputs)
+            # backward
+            loss = criterion(outputs, labels)
+
+            loss.backward()
+            # update the optimizer
+            optimizer.step()
+
+            # loss
+            running_loss += loss.item()
+
+        return running_loss, running_loss, 0
+
+    def Detector(self, net, watermarking_dict):
+        """
+        :param file_watermark: file that contain our saved watermark elements
+        :return: the extracted watermark, the hamming distance compared to the original watermark
+        """
+        # watermarking_dict = np.load(file_watermark, allow_pickle='TRUE').item() #retrieve the dictionary
+        keys = watermarking_dict['watermark']
+        res = 0
+        for img_file, label in keys.items():
+            img = self.get_image(watermarking_dict['folder'] + img_file)
+            net_guess = self.inference(net, img, watermarking_dict['transform'])
+            if net_guess == label:
+                res += 1
+        return '%i/%i' %(res,len(keys)), len(keys)-res<.1*len(keys)
+
+    def init(self, net, watermarking_dict, save=None):
+        '''
+        :param net: network
+        :param watermarking_dict: dictionary with all watermarking elements
+        :param save: file's name to save the watermark
+        :return: watermark_dict with a new entry: the secret key matrix X
+        '''
+        folder=watermarking_dict["folder"]
+        list_i = self.list_image(folder)
+        keys = {}
+        for i in range(len(list_i)):
+            keys[list_i[i]] = i % watermarking_dict["num_class"]
+
+        for img_file, label in keys.items():
+            img = self.get_image(folder + img_file)
+            for k in range(watermarking_dict["power"]):
+                self.add_images(watermarking_dict["dataset"], img, label)
+        trainloader = torch.utils.data.DataLoader(watermarking_dict["dataset"], batch_size=watermarking_dict["batch_size"],shuffle=True,num_workers=2)
+        watermarking_dict["trainloader"]=trainloader
+        watermarking_dict["watermark"]=keys
+        return watermarking_dict
+
+    def list_image(self, main_dir):
+        """return all file in the directory"""
+        res = []
+        for f in os.listdir(main_dir):
+            if not f.startswith('.'):
+                res.append(f)
+        return res
+
+    def add_images(self, dataset, image, label):
+        """add an image with its label to the dataset
+        :param dataset: aimed dataset to be modified
+        :param image: image to be added
+        :param label: label of this image
+        :return: 0
+        """
+
+        (taille, height, width, channel) = np.shape(dataset.data)
+        dataset.data = np.append(dataset.data, image)
+        dataset.targets.append(label)
+        dataset.data = np.reshape(dataset.data, (taille + 1, height, width, channel))
+        return 0
+
+    def get_image(self, name):
+        """
+        :param name: file (including the path) of an image
+        :return: a numpy of this image"""
+        image = Image.open(name)
+        return np.array(image)
+
+
+    def inference(self, net, img, transform):
+        """make the inference for one image and a given transform"""
+        img_tensor = transform(img).unsqueeze(0)
+        net.eval()
+        with torch.no_grad():
+            logits = net.forward(img_tensor.to(device))
+            _, predicted = torch.max(logits, 1)  # take the maximum value of the last layer
+        return predicted
+
+
+'''
+tools = Adi_tools()
+folder = 'Resources/adi/'
+power = 10
+watermarking_dict = {'folder': folder, 'power': power, 'dataset': trainset, 'num_class': 10,
+                     'batch_size':batch_size,'transform': inference_transform, "types":1}
+'''

Case1/NNW/UCHIDA.py

+'''
+Implementation of the method presented in Yusuke Uchida, Yuki Nagai, Shigeyuki Sakazawa, and Shin’ichi Satoh,
+“Embedding watermarks into deep neural networks,”
+in Proceedings of the 2017 ACM on International Conference on Multimedia Retrieval,
+2017, pp. 269–277.
+'''
+from utils import *
+
+class Uchi_tools():
+    def __init__(self) -> None:
+        super(Uchi_tools, self).__init__()
+
+    def Embedder_one_step(self, net, trainloader, optimizer, criterion, watermarking_dict):
+        '''
+        :param watermarking_dict: dictionary with all watermarking elements
+        :return: the different losses ( global loss, task loss, watermark loss)
+        '''
+
+        running_loss = 0
+        running_loss_nn = 0
+        running_loss_watermark = 0
+        for i, data in enumerate(trainloader, 0):
+            # split data into the image and its label
+            inputs, labels = data
+            inputs = inputs.to(device)
+            labels = labels.to(device)
+            if inputs.size()[1] == 1:
+                inputs.squeeze_(1)
+                inputs = torch.stack([inputs, inputs, inputs], 1)
+            # initialise the optimiser
+            optimizer.zero_grad()
+
+            # forward
+            outputs = net(inputs)
+            # backward
+            loss_nn = criterion(outputs, labels)
+            # watermark
+            loss_watermark = self.loss(net, watermarking_dict['weight_name'], watermarking_dict['X'], watermarking_dict['watermark'])
+
+            loss = loss_nn + watermarking_dict['lambd'] * loss_watermark  # Uchida
+
+            loss.backward()
+            # update the optimizer
+            optimizer.step()
+
+            # loss
+            running_loss += loss.item()
+            running_loss_nn += loss_nn.item()
+            running_loss_watermark += loss_watermark.item()
+        return running_loss, running_loss_nn, running_loss_watermark
+
+    def Decoder(self, net, watermarking_dict):
+        """
+        :param file_watermark: file that contain our saved watermark elements
+        :return: the extracted watermark, the hamming distance compared to the original watermark
+        """
+        # watermarking_dict = np.load(file_watermark, allow_pickle='TRUE').item() #retrieve the dictionary
+        watermark = watermarking_dict['watermark'].to(device)
+        X = watermarking_dict['X'].to(device)
+        weight_name = watermarking_dict["weight_name"]
+        extraction = self.extraction(net, weight_name, X)
+        extraction_r = torch.round(extraction) # <.5 = 0 and >.5 = 1
+        res = self.hamming(watermark, extraction_r)/len(watermark)
+        return extraction_r, float(res)*100
+
+    def init(self, net, watermarking_dict):
+        '''
+        :param net: network
+        :param watermarking_dict: dictionary with all watermarking elements
+        :param save: file's name to save the watermark
+        :return: watermark_dict with a new entry: the secret key matrix X
+        '''
+        M = self.size_of_M(net, watermarking_dict['weight_name'])
+        T = len(watermarking_dict['watermark'])
+        X = torch.randn((T, M), device=device)
+        watermarking_dict['X']=X
+        watermarking_dict["types"]=1
+        return watermarking_dict
+
+    def projection(self, X, w):
+        '''
+        :param X: secret key matrix
+        :param w: flattened weight
+        :return: sigmoid of the matrix multiplication of the 2 inputs
+        '''
+        sigmoid_func = nn.Sigmoid()
+        res = torch.matmul(X, w)
+        sigmoid = sigmoid_func(res)
+        return sigmoid
+
+    def flattened_weight(self, net, weights_name):
+        '''
+        :param net: aimed network
+        :param weights_name: aimed layer's name
+        :return: a vector of dimension CxKxK (flattened weight)
+        '''
+
+        for name, parameters in net.named_parameters():
+            if weights_name in name:
+                f_weights = torch.mean(parameters, dim=0)
+                f_weights = f_weights.view(-1, )
+                return f_weights
+
+    def extraction(self, net, weights_name, X):
+        '''
+        :param net: aimed network
+        :param weights_name: aimed layer's name
+        :param X: secret key matrix
+        :return: a binary vector (watermark)
+        '''
+        W = self.flattened_weight(net, weights_name)
+        return self.projection(X, W)
+
+    def hamming(self, s1,s2):
+        '''
+        :param s1: sequence 1
+        :param s2: sequence 2
+        :return: the hamming distance between 2 vectors
+        '''
+        assert len(s1) == len(s2)
+        return sum(c1 != c2 for c1, c2 in zip(s1, s2))
+
+    def size_of_M(self, net, weight_name):
+        '''
+        :param net: aimed network
+        :param weights_name: aimed layer's name
+        :return: the 2nd dimension of the secret key matrix X
+        '''
+        for name, parameters in net.named_parameters():
+            if weight_name in name:
+                return parameters.size()[1] * parameters.size()[2] * parameters.size()[3]
+
+    def loss(self, net, weights_name, X, watermark):
+        '''
+        :param net: aimed network
+        :param weights_name: aimed layer's name
+        :param X: secret key matrix
+        :param watermark: the watermark
+        :return: Uchida's loss
+        '''
+        loss = 0
+        W = self.flattened_weight(net, weights_name)
+        yj = self.projection(X, W)
+        for i in range(len(watermark)):
+            loss += watermark[i] * torch.log2(yj[i]) + (1 - watermark[i]) * torch.log2(1 - yj[i])
+        return -loss/len(watermark)
+
+# you can copy-paste this section into main to test Uchida's method
+'''
+tools=Uchi_tools()
+weight_name = 'features.19.weight'
+T = 64
+watermark = torch.tensor(np.random.choice([0, 1], size=(T), p=[1. / 3, 2. / 3]), device=device)
+watermarking_dict={'lambd':0.1, 'weight_name':weight_name,'watermark':watermark, "types":1}
+'''
\ No newline at end of file

Case1/NNW/__init__.py

+from .UCHIDA import *
+from .ADI import *
\ No newline at end of file

Case1/README.md

+# MPAI-NNW v1.2 implementation 
+## Case 1
+
+
+This code refers to the implementation of the MPAI-NNW, as described in https://mpai.community/wp-content/uploads/2023/10/Reference-Software-Neural-Network-Watermarking-V1.pdf.
+All the code is based in Python. 
+Case 1 resents a direct implementation of the NNW Technical Specification.
+
+### Folders
+The structure of case 1 is as followed:
+- **Imperceptibility.py**, **Robustness.py**, **ComputationalCost.py** implement the different Evaluation presented in the Technical Specification.
+  - *Imperceptibility.py* evaluates imperceptibility by training and evaluate the trained model on a testing dataset
+  - *Robustness.py* evaluates the robustness of the given method by selecting a modification **M_ID=1** Modification and **{"P":0.5}** Parameters
+  - *Computational_cost* evaluates the computational cost of the method in terms of GPU memory and time of execution
+- **utils.py** contains the common functions required for Evaluation.
+- **Attacks** folder stores 7 files that implement the 7 Modifications involved in the Robustness Evaluation.
+- **NNWfolder** stores a file for each watermarking method, a Python class that possesses three main functions (init, embedder/embedder_one_step, detectore/decoder).
+- **Resources** folder contains additional resources for the watermarking methods and pretrained weights.
+
+## Installation
+Code was designed and tested on an Ubuntu 20.04 operating system using anaconda 23.7.2 and Python 3.9.
+An environment with all the necessary libraries can be created using:
+```bash
+conda create --name <env> --file requirements.txt
+```
+
+## Run
+All modifications should be applied inside the three files (**Imperceptibility.py**, **Robustness.py**, **ComputationalCost.py**). The "to be modified" section are delimited by ####### while the code can be run:
+```bash
+conda activate <env>
+python Imperceptibility.py
+```
+To send commands to the controller as a user agent, 
+a second terminal should be open, and run:
+```bash
+conda activate <env>
+python input.py
+input: <your command>
+```
+Watermarking methods can be added in the NNW folder following the instruction specified in the technical specification (Python Class).
+
+# Licence
+[Licence](https://mpai.community/standards/mpai-cui/framework-licence/) information are detailed in the MPAI website