The first part of the paper explains the need for combining message encryption and authentication. We begin with the example to emphasize the fact that privacy does not imply authenticity. Then we prove, one needs both privacy and authenticity, even if one’s aim is just getting privacy. In the second part we present an overview of different methods for providing authenticated encryption (AE) i....

The protection of communications between Internet Things (IoT) devices is great concern because the information exchanged contains vital sensitive data. Malicious agents seek to exploit those data extract secret about owners or system. Power side channel attacks are on these their power consumption unintentionally leaks correlatable device's Several studies have demonstrated effectiveness authe...

in this paper, we show how to obtain suitable differential charactristics for block ciphers with neural networks. we represent the operations of a block cipher, regarding their differential characteristics, through a directed weighted graph. in this way, the problem of finding the best differential characteristic for a block cipher reduces to the problem of finding the minimum-weight multi-path...

Authenticated encryption (AE) has recently gained renewed interest due to the ongoing CAESAR competition. This paper deals with the performance of block cipher modes of operation for AE in parallel software. We consider the example of the AES on Intel’s new Haswell microarchitecture that has improved instructions for AES and finite field multiplication. As opposed to most previous high-performa...

This thesis provides a formal analysis of two kinds of cryptographic objects that used to be treated with much less rigor: All-or-Nothing Transforms (AONTs) and Password-Authenticated Key Exchange protocols. For both, novel formal definitions of security are given, and then practical and efficient constructions are proven secure. The constructions for password-authenticated key exchange are nov...