EChaCha20 maintains strong pseudorandomness at 16-bit and 32-bit levels with rapid diffusion after two quarter-rounds and no significant rotational collisions, based on KMP/BM analysis of one million keystreams.
Error analysis of nist sp 800-22 test suite.IEEE Transactions on Information Forensics and Security, 18:3745–3759, 2023
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Stringology-Based Cryptanalysis for EChaCha20 Stream Cipher
EChaCha20 maintains strong pseudorandomness at 16-bit and 32-bit levels with rapid diffusion after two quarter-rounds and no significant rotational collisions, based on KMP/BM analysis of one million keystreams.