Novel Remotely Keyed Encryption Schemes for Smart Card Applications

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Executive Summary

The Remotely Keyed Encryption Schemes (RKESs) are greatly useful in solving the vital problem of how to do bulk encryption/decryption for high-bandwidth applications (like multimedia data encryption) in a way that takes advantage of both the superior power of the host and the superior security of the smart card. Accordingly, the authors propose two novel RKESs, a Length Preserving (LP) RKES and a Length Increasing (LI) RKES. The proposed LPRKES is based upon a general view of the well known Feistel-Network (FN) in which they only use two rounds in an efficient and secure way, employing data-dependent cipher-keys.

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