Research And Design On Digital Signature Under Campus Network Environment

The campus net is the result of the developing of the social information, which acts many roles like teaching, scientific studies, management and outward exchanges. In this case, its safety becomes one of important research lessons of ours. This paper advances a plan which is that we use the technique of digital signature to assure the safety based on the research and comparison of various safety techniques.Based on the research of various techniques and some characteristics of the campus net, we found that the RSA is suitable for the digital signature under the campus network and did the RSA algorithm anti-attack the risk to measure analysis at the same time. Because the factorization is one of the keynotes of the study of RSA algorithm safety, this thesis reduces the value boundary of a0 is (Vw, (w+1)/2] based on derivations, so it raises the speed of factorization. For the sake of the exaltation of campus network system inside the message deliver dependability, fleetness, secrecy, the safe function, this text adapted the MD5 of an HASH function to calculate the message summary, combine them together that the public key and the security key to realize the encryption to message, decipher, signature and verification etc. This issue also expounds the concrete process that realizes of project from the design of algorithm. Also we do the programming test with ASP and verified its possibility in the fulfillment.For preventing "robot" from attacking, we use the technique of the verification code, so that we can guarantee the safety of the campus network from the whole. The determinacy prime number generative algorithm we study is a new direction of the prime number generative algorithm, it can generate the prime number quickly and effectively, and it raises the efficiency of the RSA algorithm.