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Paper · 2305.10036 · ACL · 2023

Are You Copying My Model? Protecting the Copyright of Large Language Models for EaaS via Backdoor Watermark

Lingjuan Lyu, Xing Xie, Binxing Jiao, Fangzhao Wu, Tong Xu, Bin Zhu, Wenjun Peng, Jingwei Yi, Guangzhong Sun, Shangxi Wu

arXiv · PDF · Open in the Atlas

Code that ran

We lifted 10 functions out of this paper's own repositories and ran 2 of them in a sandbox. "Ran" means the function executed on a synthesized input and returned a value. It is not a reproduction of the paper's results.

RepositoryRoleRan
yjw1029/embmarker canonical 0 of 8
yjw1029/EmbMarker — 2 of 2
FunctionStatusWhere it lives
BackDoorClassifyOutput Ran yjw1029/EmbMarker/src/model/copier/bert.py
code served (permissive licence) · get_code("903f1433d8d2db1f")
BertForClassifyWithBackDoor Ran yjw1029/EmbMarker/src/model/copier/bert.py
code served (permissive licence) · get_code("86093b919ea4359f")
convert_mind_tsv_dict Not yet run yjw1029/embmarker/src/dataset/utils.py
code served (permissive licence) · get_code("1c3e5679dd810aea")
eval_copier Not yet run yjw1029/embmarker/src/run_gpt_backdoor.py
code served (permissive licence) · get_code("b3400e6c8205d71d")
flatten Not yet run yjw1029/embmarker/src/utils.py
code served (permissive licence) · get_code("f77001035699a79b")
get_label_dict Not yet run yjw1029/embmarker/src/dataset/utils.py
code served (permissive licence) · get_code("2d6b92ecffe170d3")
load_gpt_embeds Not yet run yjw1029/embmarker/src/dataset/emb_cache.py
code served (permissive licence) · get_code("a56d8bae91268b94")
load_mind Not yet run yjw1029/embmarker/src/dataset/utils.py
code served (permissive licence) · get_code("77269134ce3b18bc")
merge_flatten_metrics Not yet run yjw1029/embmarker/src/utils.py
code served (permissive licence) · get_code("37ec69a16ec99bbd")
train_copier Not yet run yjw1029/embmarker/src/run_gpt_backdoor.py
code served (permissive licence) · get_code("5bbc5ec0e19a75ed")

Repositories linked to this paper

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Abstract

Large language models (LLMs) have demonstrated powerful capabilities in both text understanding and generation. Companies have begun to offer Embedding as a Service (EaaS) based on these LLMs, which can benefit various natural language processing (NLP) tasks for customers. However, previous studies have shown that EaaS is vulnerable to model extraction attacks, which can cause significant losses for the owners of LLMs, as training these models is extremely expensive. To protect the copyright of LLMs for EaaS, we propose an Embedding Watermark method called EmbMarker that implants backdoors on embeddings. Our method selects a group of moderate-frequency words from a general text corpus to form a trigger set, then selects a target embedding as the watermark, and inserts it into the embeddings of texts containing trigger words as the backdoor. The weight of insertion is proportional to the number of trigger words included in the text. This allows the watermark backdoor to be effectively transferred to EaaS-stealer's model for copyright verification while minimizing the adverse impact on the original embeddings' utility. Our extensive experiments on various datasets show that our method can effectively protect the copyright of EaaS models without compromising service quality. Our code is available at https://github.com/yjw1029/EmbMarker.

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have("2305.10036")

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