Cryptographie à Base de Couplage : Chiffrement à Base d’Identité

Abstract

Unlike the symmetric encryption, asymmetric encryption allows us to send mes- sages without establishing a secrecy in the advance, thanks to a public key certi- fication authority. The identity-based encryption introduced by Shamir in 1984, exempts this authority by constructing the public key from the identity of the re- ceiver. In this work we present an identity-based encryption scheme inspired from the one of WEE, using elliptic curves and the concept of pairing which is a bilin- ear map between groups constucted using these curves. Besides of exploring the various concepts that encompasses our theme entitled "Pairing-based cryptography : identity-based encryption" such as elliptic curves, pairing and the identity-based encryption system, we present some of the work done in this domain and which have allowed us to build our own system and obtain good results using Python. As future work, we hope to enrich our own pairing library as well as integring a scheme of digital signature to strengthen the security of our scheme