Scream: a software-efficient stream cipher

Shai Halevi; Don Coppersmith; Charanjit Jutla

Paper 2002/019

Scream: a software-efficient stream cipher

Shai Halevi, Don Coppersmith, and Charanjit Jutla

Abstract

We report on the design of Scream, a new software-efficient stream cipher, which was designed to be a ``more secure SEAL''. Following SEAL, the design of Scream resembles in many ways a block-cipher design. The new cipher is roughly as fast as SEAL, but we believe that it offers a significantly higher security level. In the process of designing this cipher, we re-visit the SEAL design paradigm, exhibiting some tradeoffs and limitations.

Note: some typos in the pseudocode were corrected

Metadata

Available format(s): PDF PS
Category: Secret-key cryptography
Publication info: Published elsewhere. A shorter version appears in the proceedings of FSE'02
Keywords: Stream ciphers Block ciphers Round functions SEAL
Contact author(s): shaih @ watson ibm com
History: 2002-06-05: last of 2 revisions; 2002-02-16: received; See all versions
Short URL: https://ia.cr/2002/019
License: CC BY

BibTeX

@misc{cryptoeprint:2002/019,
      author = {Shai Halevi and Don Coppersmith and Charanjit Jutla},
      title = {Scream: a software-efficient stream cipher},
      howpublished = {Cryptology {ePrint} Archive, Paper 2002/019},
      year = {2002},
      url = {https://eprint.iacr.org/2002/019}
}