Speeding up smart card RSA computations with insecure coprocessors

Treats the problem how small devices such as smart cards can efficiently compute signatures, execute signature verifications and and decipher encrypted messages based on the RSA algorithm, making use of the computing power of `insecure' auxiliary devices such as POS, banking and telephone terminals.Anglai

CORSAIR: a chip card with fast RSA capability

Firstly the authors; describe the evolution of smart cards: the first experiment was the two-chip card in France, with only small capability (for the memory and cryptographic algorithms); then physical security was much augmented with the one-chip card; the next step was the smart card with DES capability and its full use of the power of secret key algorithms; now it is time for the smart card including the RSA capability, opening the door for public key algorithms (signature, key exchange, identification using zero-knowledge protocols). A typical organization of a smart card with fast RSA capability, CORSAIR, Chip Organization for RSA In a Rush, is described and some detailed are given about the technical specifications and the expected performance.Anglai