加密的几种常用的源码包，应用于数据库表部分字段的加密，图象文件等文档加密，双方通信时数据加密传输防他人网络截取信息。非对称RSA或ECC公钥加密私钥解密或者可用于数字签名 对称加密AES或者DES,56位的DES加密，128位或192位或256位AES加解密通常可设随便的密码长度，其它位用常字符代替；非对称加密多要先因式分解，对称加密多就移位处理。,Several common source package encryption, encryption, image files, and other document encryption applied to the part of the field of the database table, the two sides communicate data encryption transmission Anti others network interception. The asymmetric RSA or ECC public key to encrypt the private key to decrypt or can be used for digital signatures　symmetric encryption AES or DES, 56-bit DES encryption, 128-bit or 192-bit or 256-bit AES encryption and decryption usually can be set casually password length, other bits instead of using the regular characters　asymmetric encryption first multi factorization, symmetric encryption shift process.