Abstract: Taking advantage of compression algorithm and C language compiler supporting analysis,we proposed a lowcost protection strategy. To reduce the cost of protection, we designed a security model based on the security problem of C language itself to protect the object code using different security level. Moreover,we invented a new binary compression code algorithm(I3CC) based on the blocks to compress the target code before using the protected strategies to further step down protects spending. Through the experiment, we got about 80%~90% cost of the strategy which do not use the compression algorithm.

Key words: Code security, Security module, Compress algorithm, Low storage capacity