Alex Gaynor 3/14/2016

Anatomy of a Crypto Vulnerability

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This technical article dissects a security flaw in the Beaker Python library's encrypted session implementation. It explains how the library's use of a static counter (nonce) in AES-CTR mode, combined with a key derivation process that could repeat, breaks confidentiality and allows session data decryption. The post details the code path and the cryptographic principles violated.

Anatomy of a Crypto Vulnerability

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