Comparing and implementation of public key cryptography algorithms on smart card

As the smart card is used increasingly and widely, security becomes a primary issue for information transmission. public key cryptography is the main research directions of smart card encryption. This article first analysis of the principles of public key cryptography, illustrates two typical cryptographics RSA and ECC. Moreover, comparison and discussion about public key sizes and the security required of these two cryptographics. In the case of Ecc´s uses with smaller keys to provide high security and high speed in a low bandwidth, this article select ECC cryptographic to implement the smart card encryption.