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However, as counter-arguments Shamir went on to identify two areas where a dedicated stream cipher might conceivably offer some advantage over block ciphers: (1) where exceptionally high throughput is required in software and (2) where exceptionally low resource consumption is required in hardware.Дragon is a word-based stream cipher. Some also doubt our understanding of how best to design a dedicated stream cipher, a view somewhat supported by the lack of surviving stream ciphers in the NESSIE project. As arguments against, one might observe that for most applications, the use of the AES in an appropriate stream cipher mode frequently offers a perfectly adequate solution. In particular, with AES deployment being so wide-spread, Shamir wondered whether there remained a need for a stream cipher of dedicated design. There, as part of the CryptographerвЂ™s Panel, Adi Shamir made some insightful comments on the state of stream ciphers. The origins of eSTREAM can be traced back to the 2004 RSA Data Security Conference. The book is rounded off by two implementation surveys covering both the software- and the hardware-oriented finalists.

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This volume describes the most successful of the submitted designs and, over 16 chapters, provides full specifications of the ciphers that reached the final phase of the eSTREAM project. Over the following years the submissions were assessed with regard to both security and practicality by the cryptographic community, and the results were presented at major conferences and specialized workshops dedicated to the state of the art of stream ciphers.

Algorithm designers were invited to submit new stream cipher proposals to eSTREAM, and 34 candidates were proposed from around the world. The goal of eSTREAM was to promote the design of new stream ciphers with a particular emphasis on algorithms that would be either very fast in software or very resource-efficient in hardware. This state-of-the-art survey presents the outcome of the eSTREAM Project, which was launched in 2004 as part of ECRYPT, the European Network of Excellence in Cryptology (EU Framework VI).

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