Description
In this talk, I will describe the family of authenticated encryption (with associated data) algorithms SCREAM and iSCREAM. They are based on Liskov et al.'s Tweakable Authenticated Encryption (TAE) mode with the new tweakable block ciphers Scream and iScream. The main desirable features of SCREAM and iSCREAM are:<br/> * A simple and regular design allowing excellent performances on a wide range of architectures, in particular if masking is implemented as a side-channel countermeasure;<br/> * Inheriting from TAE, security beyond the birthday bound, i.e. a 128-bit security guarantee with up to 2128 bits of data processed with the same 128-bit key;<br/> * Low overheads for the authentication mode (e.g. no extra cipher calls to generate masks);<br/> * Fully parallelisable authenticated encryption with minimal ciphertext length.<br/> In addition, iSCREAM allows compact implementations for combined encryption and decryption, by taking advantage of involutive components in its underlying cipher iScream.
Next sessions
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Séminaire C2 à INRIA Paris
Emmanuel Thomé et Pierrick Gaudry Rachelle Heim Boissier Épiphane Nouetowa Dung Bui Plus d'infos sur https://seminaire-c2.inria.fr/ -
Attacking the Supersingular Isogeny Problem: From the Delfs–Galbraith algorithm to oriented graphs
Speaker : Arthur Herlédan Le Merdy - COSIC, KU Leuven
The threat of quantum computers motivates the introduction of new hard problems for cryptography.One promising candidate is the Isogeny problem: given two elliptic curves, compute a “nice’’ map between them, called an isogeny.In this talk, we study classical attacks on this problem, specialised to supersingular elliptic curves, on which the security of current isogeny-based cryptography relies. In[…]-
Cryptography
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