Ben shu di yi bu fen jiang shu le mi ma ji shu de li shi yan ge, Dui cheng mi ma(biao zhun cong DES dao zui xin de AES), Fen zu mi ma mo shi(bao kuo ECB, CBC, CFB, OFB, CTR), Gong yao, Hun he mi ma xi tong. Di er bu fen zhong dian jie shao shi bie fang mian de nei rong, She ji xiao xi shi bie ma, Shu zi qian ming deng. Di san bu fen bao kuo mi yao, Sui ji shu, PGP, SSL/TLS yi ji mi ma ji shu zai xian shi sheng huo zhong de ying yong. Ben shu tong guo da liang tu shi dui ge zhong mi ma ji shu ji qi xiang hu jian de guan xi jin xing le tong su yi dong de jiang jie.