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OleF: An Inverse-Free Online Cipher
Authors: Ritam Bhaumik, Mridul NandiAbstract:
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.
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