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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.02095 |
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| _version_ | 1866908298751508480 |
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| author | Alexeev, Boris Percival, Colin Zhang, Yan X |
| author_facet | Alexeev, Boris Percival, Colin Zhang, Yan X |
| contents | Systems such as file backup services often use content-defined chunking (CDC) algorithms, especially those based on rolling hash techniques, to split files into chunks in a way that allows for data deduplication. These chunking algorithms often depend on per-user parameters in an attempt to avoid leaking information about the data being stored. We present attacks to extract these chunking parameters and discuss protocol-agnostic attacks and loss of security once the parameters are breached (including when these parameters are not setup at all, which is often available as an option). Our parameter-extraction attacks themselves are protocol-specific but their ideas are generalizable to many potential CDC schemes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_02095 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chunking Attacks on File Backup Services using Content-Defined Chunking Alexeev, Boris Percival, Colin Zhang, Yan X Cryptography and Security Systems such as file backup services often use content-defined chunking (CDC) algorithms, especially those based on rolling hash techniques, to split files into chunks in a way that allows for data deduplication. These chunking algorithms often depend on per-user parameters in an attempt to avoid leaking information about the data being stored. We present attacks to extract these chunking parameters and discuss protocol-agnostic attacks and loss of security once the parameters are breached (including when these parameters are not setup at all, which is often available as an option). Our parameter-extraction attacks themselves are protocol-specific but their ideas are generalizable to many potential CDC schemes. |
| title | Chunking Attacks on File Backup Services using Content-Defined Chunking |
| topic | Cryptography and Security |
| url | https://arxiv.org/abs/2504.02095 |