Hi, Each certificate has a pair of public key and private key associated with it. Can I extract the public key and private key from it to do encryption, signing, and decryption? Does openssl support any kind of encryption and decryption like PGPsdk? Angus Lee --------------------------------------------------- Get Your Free Email at http://www.hknetmail.com ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]