In this paper we have presented an energy efficient scheme of public key cryptography using data aggregation for Wireless Sensor Networks. The scheme tries to solve the problem of energy efficiency in Public key cryptography. It provides two way authentications over the sensor network using Public key cryptography. The first level is to perform handshaking by using the key as authentication cod...

Given a graph G, a visual cryptography scheme based on the graph G is a method to distribute a secret image among the vertices of G, the participants, so that a subset of participants can recover the secret image if they contain an edge of G, by stacking their shares, otherwise they can obtain no information regarding the secret image. In this paper we apply maximal independent sets of the grap...

In recent years it has been trying that with regard to the question of computational complexity of discrete logarithm more strength and less in the elliptic curve than other hard issues, applications such as elliptic curve cryptography, a blind  digital signature method, other methods such as encryption replacement DLP. In this paper, a new blind digital signature scheme based on elliptic curve...

We propose a new approach to code-based signatures that makes use in particular of rank metric codes. When the classical approach consists in finding the unique preimage of a syndrome through a decoding algorithm, we propose to introduce the notion of mixed decoding of erasures and errors for building signature schemes. In that case the difficult problem becomes, as is the case in lattice-based...

This paper presents a hardware implementation for Encoder and Decoder of the cryptography technique using versatile Error Control Algorithms of Block Codes used in wireless communication networks. This work is focused on the designing of VLSI based hardware implementable and more secured alternative of existing software based symmetric cryptography techniques using DES (Data Encryption Standard...

In this paper we describe the first implementation on smartcard of the code-based authentication protocol proposed by Stern at Crypto’93 and we give a securization of the scheme against side channel attacks. On the whole, this provides a secure implementation of a very practical authentication (and possibly signature) scheme which is mostly attractive for light-weight cryptography.

More and more software use cryptography. But how can one know if what is implemented is good cryptography? For proprietary software, one cannot say much unless one proceeds to reverse-engineering, and history tends to show that bad cryptography is much more frequent than good cryptography there. Open source software thus sounds like a good solution, but the fact that a source code can be read d...

Cryptology consists of two complementary fields of research. One is cryptography where the development of new schemes or algorithms are concerned with its security analysis. The other one is cryptanalysis where attacks for the cryptographic algorithms are being studied. Hash function, message authentication code (or MAC), encryption and authenticated encryption are widely used objects in crypto...

In this paper we describe a deductive verification platform for the CAO language. CAO is a domain-specific language for cryptography. We show that this language presents interesting challenges for formal verification, not only in the rich mathematical type system that it introduces, but also in the cryptography-oriented language constructions that it offers. We describe how we tackle these prob...

High security network transactions require the checking of the revocation status of public key certificates. On mobile systems this may lead to excessive delays and unacceptable performance. This paper examines small system requirements and options with a view to improving performance. It is shown that the use of keyed hash functions (message authentication codes) with a pre-registration option...