In recent years, amendments to IEEE standards for wireless networks added support for authentication algorithms based on the Extensible Authentication Protocol (EAP). Available solutions generally use digital certificates or pre-shared keys but the management of the resulting implementations is complex or unlikely to be scalable. In this paper we present EAP-SRP-256, an authentication method pr...

In this work, we initiate the study of position-based cryptography in the quantum setting. The aim is to use the geographical position of a party as its only credential. This has interesting applications, e.g., it enables two military bases to communicate over insecure channels and without having any pre-shared key, with the guarantee that only parties within the bases learn the content of the ...

The Advanced Encryption Standard (AES) is the most widely used block cipher. The high level structure of AES can be viewed as a (10-round) key-alternating cipher, where a t-round key-alternating cipher KAt consists of a small number t of fixed permutations Pi on n bits, separated by key addition: KAt(K,m) = kt ⊕ Pt(. . . k2 ⊕ P2(k1 ⊕ P1(k0 ⊕m)) . . . ), where (k0, . . . , kt) are obtained from ...

A proxy re-encryption (PRE) scheme allows a designated proxy, that has beforehand received a so-called re-encryption key, to translate a ciphertext intended to one user to a ciphertext intended to another one. Traditionally, the re-encryption key is generated at the initiative of the initial receiver and ideally, no secret keys should be known to the proxy. Such scheme is said unidirectional if...