Information AboutSnow |
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SNOW 1.0 and '''2.0''' are two word-based synchronous stream ciphers developed by Thomas Johansson and Patrik Ekdahl at Lund University . SNOW 1.0, originally simply SNOW, was submitted to the NESSIE project. The cipher has no known intellectual property or other restrictions. The cipher works on 32-bit words and supports both 128- and 256-bit keys. The cipher consists of a combination of a LFSR and a Finite State Machine (FSM) where the LFSR also feeds the next state function of the FSM. The cipher has a short initialization phase and very good performance on both 32-bit processors and in hardware. During the NESSIE evaluation weaknesses was discovered and SNOW was therefore not included in the NESSIE suite of algorithms. The authors has developed a new version, version 2.0 of the cipher, that solves the weaknesses and improves the performance. SNOW has been used in the ESTREAM project as a reference cipher for the performance evaluation. EXTERNAL LINKS |
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