Design space extension for secure implementation of block ciphers

On the Design of Secure Block Ciphers

In this paper, we examine a class of block ciphers referred to as substitutionpermutation networks or SPNs. We assert that the basic SPN architecture can be used to provide an efficient implementation of a secure block cipher if the system S-boxes are carefully selected and connected with an appropriate linear transformation. Specifically, it is shown that S-boxes which possess good diffusion a...

Provable secure scalable block ciphers

Security of Block Ciphers - From Algorithm Design to Hardware Implementation

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Efficient and Optimally Secure Key-Length Extension for Block Ciphers via Randomized Cascading

We consider the question of efficiently extending the key length of block ciphers. To date, the approach providing highest security is triple encryption (used e.g. in Triple-DES), which was proved to have roughly κ+ min{n/2, κ/2} bits of security when instantiated with ideal block ciphers with key length κ and block length n, at the cost of three block-cipher calls per message block. This paper...

XHX - A Framework for Optimally Secure Tweakable Block Ciphers from Classical Block Ciphers and Universal Hashing

Tweakable block ciphers are important primitives for designing cryptographic schemes with high security. In the absence of a standardized tweakable block cipher, constructions built from classical block ciphers remain an interesting research topic in both theory and practice. Motivated by Mennink’s F̃ [2] publication from 2015, Wang et al. proposed 32 optimally secure constructions at ASIACRYPT’...