Hello Mario, 3DES and SHA-1 are two different encryption algorithms. 3DES is a symmetric algo and SHA-1 is a hashing algo.
A typical scenario would be : The message is encrypted using 3DES to ensure that even if the message is intercepted the intruder is unable to view the message. SHA-1 is used to create a hash of the message and this hash is sent along with the message to the receiver. When the recipients receives the message, he recalculates the hash to see if they both match. If the hash matches then the message is original and has not been tampered with. In short, SHA-1 maintains the integrity of the message and 3DES maintains the confidentiality of the message. They are both used in tandem. Cheryl Goh Security Consultant, CISSP ----- Original Message ----- From: "Mario Behring" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, July 09, 2002 3:56 AM Subject: 3DES versus SHA-1 > Hi all, > > The purpose is to transfer data between sites securely using emails, HTTP, > FTP, IP (LAN/WAN), etc. > > Which algorithm should I use: 3DES or SHA-1 ? > > Thanks. > > Mario > > __________________________________________________ > Do You Yahoo!? > Sign up for SBC Yahoo! Dial - First Month Free > http://sbc.yahoo.com > >
