Abstract: The digital signature is realized maily by the symmetric encryption algorithm.ElGamal algorithm,a commonly used symmetric encryption algorithm,is widly used in the digital signature and the encryption,with the advantages of fast generation and simple signature verification.Visual Foxpro is a widdely-applied targe-oriented databse designing system.In this paper the realization of ElGamal digital signature algorithm is detailedly introduced,and the course and interface of ElGamal digital signature in VFP is described.

Key words: ElGamal algorithm, digital signature, visual foxpro