Dumm Zeuch • 9/15/2026

TxtCipher code review: RC4 keystream reuse and a versioned AES format

A security review of TxtCipher, a dependency-free HTML encryption tool, reveals RC4 keystream reuse issues inherent to TxtCrypt compatibility, recommending AES-256 for general use. The AES mode now uses a versioned header with iteration count as authenticated data, allowing PBKDF2 iterations to be raised without breaking old ciphertexts.

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#cryptography #Security Review #Rc4