Another look at XCB
@article{Chakraborty2015AnotherLA, title={Another look at XCB}, author={Debrup Chakraborty and Vicente Hernandez-Jimenez and Palash Sarkar}, journal={Cryptography and Communications}, year={2015}, volume={7}, pages={439-468} }
XCB is a tweakable enciphering scheme (TES) which was first proposed in 2004. The scheme was modified in 2007. We call these two versions of XCB as XCBv1 and XCBv2 respectively. XCBv2 was later proposed as a standard for encryption of sector oriented storage media in IEEE-std 1619.2 2010. There is no known proof of security for XCBv1 but the authors provided a concrete security bound for XCBv2 and a “proof” justifying the bound. In this paper we show that XCBv2 is not secure as a TES by showing…
11 Citations
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It is pointed out that XCB, HCTR and HCH (and two variations of HCH) can not resist distinguishing attack, key-recovery attack and plaintext-reCOvery attack once the weak key is recognized and can resist related-key attack under the assumption that the underlying block cipher resists related- key attack.
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