Algorithm of large sparse matrices reduction in quadratic sieve;

Experimental Data Analysis on the Secondary Screening of IC;

High reliable electronic product depends on high reliable components Quality assurance of components involves offective control for the selection,secondary screening,quality track and the estabishing of component quality databas

This passage discuss the prombles of our institute developing electronical componets secondary sureening in the recert years , also the prombles of the development s way of secondary screening and how to control the quality of the electronical components.

Finally,the algorithm was applied to a quadratic sieve.

In this article we study the quadratic sieve in large integer factorization,declare a kind of optimization in choosing algorithms,parameters,hardware and the control of courses,which in turn influence the safety of RSA Cryptosystem directly,and enhance the development of information safety.