Spritz - a spongy RC4-like stream cipher and hash function

  title={Spritz - a spongy RC4-like stream cipher and hash function},
  author={Ronald L. Rivest and Jacob C. N. Schuldt},
  journal={IACR Cryptology ePrint Archive},
This note reconsiders the design of the stream cipher RC4, and proposes an improved variant, which we call “Spritz” (since the output comes in fine drops rather than big blocks.) Our work leverages the considerable cryptanalytic work done on the original RC4 and its proposed variants. It also uses simulations extensively to search for biases and to guide the selection of intermediate expressions. We estimate that Spritz can produce output with about 24 cycles/byte of computation. Furthermore… CONTINUE READING
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