http://www.aliov.org/ 2010-07-31T07:58:55+02:00 http://www.aliov.org/ http://www.aliov.org/lib/images/favicon.ico text/html 2010-07-27T17:20:00+02:00 Ali Abdallah http://www.aliov.org/doku.php?id=wiki:general:postfix-ssl&rev=1280244000&do=diff text/html 2010-07-20T19:00:32+02:00 Ali Abdallah http://www.aliov.org/doku.php?id=wiki:general:postfix&rev=1279645232&do=diff main.cfg myhostname = HOSTNAME mydomain = $myhostname myorigin = $mydomain mydestination = localhost mynetworks_style = host relay_domains = $mydestination home_mailbox = Maildir/ virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf virtual_mailbox_limit_maps = mysql:/etc/postfix/mysql_virtual_mailbox_limit_maps.cf virtual_mailbox_… text/html 2010-07-11T13:50:55+02:00 Ali Abdallah http://www.aliov.org/doku.php?id=articles:mathematics:crypto:introduction&rev=1278849055&do=diff Definition A cryptography system is defined as follows: * : is a finite set of decrypted text or plain text * : is a finite set of encrypted text * : is a finite set of keys * : is a finite set of encryption rules, e.g. set of encryption functions * : is a finiste set of decryption rules, e.g. set of decryption functions text/html 2010-07-11T13:48:42+02:00 Ali Abdallah http://www.aliov.org/doku.php?id=articles:mathematics:crypto:diffie-hellmann&rev=1278848922&do=diff A and B want to communicate sensitive data between them securely, both of them need to have a key to be used in the encryption/decryption algorithm that they want to implement. A says, ok i can generate a random number send it to B and we both use this key for encryption/decryption, but B says, if the message containing the key gets intercepted by C, then C can decrypt all the messages going between A and B.