Jang Si Ung , Sin Byeong Cheol , Kim Yang Gog

The KIPS Transactions:PartD, Vol. 10, No. 6, pp. 1059-1066, Oct. 2003
10.3745/KIPSTD.2003.10.6.1059,   PDF Download:

Abstract

In this paper, the magnetic sensing system is designed and implemented for the safe security in internet commerce system. When the payment is required in the internet commerce system, the magnetic sensing system will get the information from a credit card without keyboard input and then encrypt and transmit the information to server. The credit card sensing system, which is proposed in this paper, is safe from keyboard hacking because it encrypts card information immediately in its internal chip and sends the information to host system. For the protection of information, the magnetic sensing system is basically based on a synchronous stream cipher cryptosystem which is related to a group of matrices. The size of matrices and the bits of keys for the best performances are determined for various cases. It is shown that for credit card payments, matrices of size 2 have a performance even at most 128bits keys with the consideration of inverse matrices. For authentication of general-purpose data, the magnetic sensing system needs more than 0.5KB data and in this case, the optimum size of matrices is 2 or 3 at more 256bits keys with consideration of inverse matrices.

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