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

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OleF: An Inverse-Free Online Cipher

Authors: Ritam Bhaumik, Mridul Nandi


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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