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arXiv · 2503.23627

Security Analysis of Chain-FS service

Vanessa Teague·Arash Mirzaei
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Abstract

We examine the security of a cloud storage service that makes very strong claims about the ``trustless'' nature of its security. We find that, although stored files are end-to-end encrypted, the encryption method allows for effective dictionary attacks by a malicious server when passwords only just meet the minimum length required. Furthermore, the file sharing function simply sends the decryption passwords to the server with no protection other than TLS.

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Vanessa Teague, Arash Mirzaei. 2025-03-30. Security Analysis of Chain-FS service. https://arxiv.org/abs/2503.23627

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