[Resource Topic] 2016/1090: OleF: An Inverse-Free Online Cipher

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Title:
OleF: An Inverse-Free Online Cipher

Authors: Ritam Bhaumik, Mridul Nandi

Abstract:

Online ciphers, in spite of being insecure against an sprp adversary, can be desirable at places because of their ease of implementation and speed. Here we propose a single-keyed inverse-free construction that achieves online sprp security with an optimal number of blockcipher calls. We also include a partial block construction, without requiring any extra key.

ePrint: https://eprint.iacr.org/2016/1090

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