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dp-forward's Issues

Couldn't find "sst2_eps8_embedding" on hugging face in embedding inversion attack.

In the file attacks/embedding_inversion_attack.py
it uses the following code to load pretrained model on hugging face, but it can't find "sst2_eps8_embedding"

model = BertForSequenceClassification.from_pretrained("bert-base-uncased")
model_dp = BertForSequenceClassification.from_pretrained("sst2_eps8_embedding")
tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")

It tells me

OSError: sst2_eps8_embedding is not a local folder and is not a valid model identifier listed on 'https://huggingface.co/models'
If this is a private repository, make sure to pass a token having permission to this repo either by logging in with `huggingface-cli login` or by passing `token=<your_token>`

What's more, the example of "embedding_inversion_attack.py" in readme.md is mistaken to be replaced with "sensitive_attributes_attack.py". Could you please give a correct example for embedding inversion attack?

Noise generate

In "add_noise", "torch.normal" is used to generate noise_embeds. Where is "MVG_noise" used?

DP-Forward/dp_noise.py

Lines 162 to 167 in d60f7bd

def add_noise(embeddings,noise_factor=0.5,norm_c=1.0,add_noise=True):
if add_noise:
embeddings = _max_norm_clip(embeddings, norm_c)
noise_embeds = noise_factor * torch.normal(mean=0, std=1, size=embeddings.shape).to(embeddings.device)
embeddings = noise_embeds + embeddings
return embeddings

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