Abstract
This chapter provides general requirements to modern block ciphers required for implementation at lightweight cryptographic transformations for critical distributed environment applications with Green IT conformance. It is given an overview of well-known block ciphers and lightweight primitives PRESENT and CLEFIA, defined at ISO/IEC 29192-2. It is given a specification of the lightweight block cipher Cypress that was recently developed and presented in Ukraine. Cypress does not use heavy computation operations, nor require any precomputed tables that allows efficient hardware implementation. The Cypress performance in software is approximately three times higher than AES one on Windows, Linux and Android platforms.
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