"ChaCha" family of ciphers aim to increase the diffusion per round while achieving the same or slightly better performance.The Aumasson et al. paper also attack

"ChaCha" family of ciphers aim to increase the diffusion per round while achieving the same or slightly better performance.The Aumasson et al. paper also attacks ChaCha, achieving one round less: ChaCha6 with complexity 2^140 and ChaCha7 with complexity 2^231 https://en.wikipedia.org/wiki/ChaCha20 https://en.wikipedia.org/wiki/ChaCha20 Also used in: https://tools.ietf.org/id/draft-agl-tls-chacha20poly1305-04.html https://tools.ietf.org/id/draft-agl-tls-chacha20poly1305-04....