Basic RSA and PGP JAVA examples.

GnuPG（GNU Privacy Guard或GPG）是一个以GNU通用公共许可证释出的开放源码用于加密或签名的软件，可用来取代PGP。gnupg-1.2.2版本的代完整源代码。里面有FAQ-GnuPG (GNU Privacy Guard or GPG) is used for encryption or signature of the open source software, released under the GNU General Public License can be us

PGP电子邮件 加密解密 流程（图） 电子邮件安全——PGP 的原理与使用-PGP e-mail encryption and decryption process (Figure)

In cryptography, the International Data Encryption Algorithm (IDEA), originally called Improved Proposed Encryption Standard (IPES), is a symmetric-key block cipher designed by James Massey of ETH Zurich and Xuejia Lai and was first described in 1991