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Cryptography

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Displaying 126 - 136 of 136

Key Recovery Attack for ZHFE

June 4, 2017
Author(s)
Daniel Cabarcas, Daniel Smith-Tone, Javier A. Verbel
At PQCRYPTO 2014, Porras, Baena and Ding introduced ZHFE, an interesting new technique for multivariate post-quantum encryption. The scheme is a generalization of HFE in which a single low degree polynomial in the central map is replaced by a pair of high

Full Disk Encryption: Bridging Theory and Practice

February 3, 2017
Author(s)
Louiza Khati, Nicky Mouha, Damien Vergnaud
We revisit the problem of Full Disk Encryption (FDE), which refers to the encryption of each sector of a disk volume. In the context of FDE, it is assumed that there is no space to store additional data, such as an IV (Initialization Vector) or a MAC

On the Differential Security of the HFEv - Signature Primitive

February 4, 2016
Author(s)
Ryann Cartor, Ryan Gipson, Daniel Smith-Tone, Jeremy Vates
Multivariate Public Key Cryptography (MPKC) is one of the most attractive post-quantum options for digital signatures in a wide array of applications. The history of multivariate signature schemes is tumultuous, however, and solid security arguments are

Security Analysis and Key Modification for ZHFE

February 4, 2016
Author(s)
Ray A. Perlner, Daniel C. Smith-Tone
ZHFE, designed by Porras et al., is one of the few promising candidates for a multivariate public-key encryption algorithm. In this article we extend and expound upon the existing security analysis on this scheme. We prove security against differential

A Profile for U. S. Federal Cryptographic Key Management Systems

October 28, 2015
Author(s)
Elaine B. Barker, Miles Smid, Dennis Branstad
This Profile for U. S. Federal Cryptographic Key Management Systems (FCKMSs) contains requirements for their design, implementation, procurement, installation, configuration, management, operation, and use by U. S. Federal organizations. The Profile is

PFLASH - Secure Asymmetric Signatures on Smart Cards

July 21, 2015
Author(s)
Ming-Shing Chen, Bo-Yin Yang, Daniel Smith-Tone
We present PFLASH, an asymmetric digital signature scheme appropriate for smart card use. We present parameters for several security levels in this low resource environment and bootstrap many technical properties (including side-channel resistance) exposed

Differential Properties of the HFE Cryptosystem

October 1, 2014
Author(s)
Taylor Daniels, Daniel Smith-Tone
Multivariate Public Key Cryptography (MPKC) has been put forth as a possible post-quantum family of cryptographic schemes. These schemes lack provable security in the reduction theoretic sense, and so their security against yet undiscovered attacks remains

On the Differential Security of Multivariate Public Key Cryptosystems

November 29, 2011
Author(s)
Daniel C. Smith-Tone
Since the discovery of an algorithm for factoring and computing discrete logarithms in polynomial time on a quantum computer, the cryptographic community has been searching for an alternative for security in the approaching post-quantum world. One
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