在线售书网站，用户登录，注册等模块实现密钥协商和加密传输，包含RSA 和 DES 的php和JS两个版本，压缩包内含有数据库文件。很适合初学者。 -Online book sites, user login, registration and other modules to achieve key negotiation and encrypted transmission, including RSA and DES are two versions of php and JS, compr