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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 constr...
Revisiting Turning Online Cipher Off
symmetric-key cryptography cryptanalysis SPRP security
2015/12/23
In 'Turning Online Ciphers Off', a class of constructions was defined based on layers of secure online ciphers interleaved with simple mixing layers (like reversing and block-shifting). Here we show t...
A Simple Security Analysis of Hash-CBC and a New Efficient One-Key Online Cipher
random permutation pseudo random permutation Online function
2008/9/1
In Crypto 2001, Bellare et al. [1] introduced online cipher (or online permutation) and
proposed two Hash-CBC mode constructions, namely HCBC and HPCBC along with security
proofs. We observe that, t...