![]() We apply the ET framework on GIFT and AES to construct efficient tBCs, named TweGIFT and TweAES. In this paper, as a first contribution, we present a dedicated framework, called the Elastic-Tweak framework ( ET in short), to convert any reasonably secure SPN block cipher into a secure tBC. So a dedicated paradigm to construct short-tweak TBCs (tBC) is highly desirable. Specifically, they are not optimized for short tweaks, which might render them inefficient for certain resource constrained applications. However, the existing TBC construction frameworks, including TWEAKEY and XEX, are designed for general purpose tweak sizes. In multi-keyed applications, a TBC with short tweak values can be used to replace multiple keys. At a high level, it provides flexibility in design and (possibly) better security bounds. Tweakable block cipher (TBC), a stronger notion than standard block ciphers, has wide-scale applications in symmetric-key schemes. Book series (LNCS, volume 13143) Abstract ![]()
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