A digital signature is used to ensure completeness and effectiveness of some original data.A digital signature scheme consists of a signature generation algorithm and an associated verification algorithm.This paper provides a brief introduction to the basic ideas behind blind and proxy signatures,and shows how these signatures can be realized through reversible public-key encryption techniques.describes in detail a proxy blind signature scheme based on The Discrete Logarithm Problem.Finally,we discuss some techniques based on the intractability of the discrete logarithm problem.Based on above it shows some profit advise which agreement achieving.