Research on protection technology based on code secure

The code secure seems more important because it concerns that if software is safely applied in many fields,and influence the security of computer system.Along with the in-depth development of network attack and defense technology the higher security to sof-tware are required.As a result of code's vulnerabilities,application,web system and DB system are faced with a lot of secure problems.Its security problems in overruns,cross-sit scripting,SQL attack,crypto code,failure code and impersonation are discussed.Some protection technology based on code secure is presented,include managed code,probe the memory,regular expression detect,signcode and so on,to guarantee the software the reliability.Finally a number of principles are given to enhance security of the coding.