home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!mips!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!ucbvax!p5555.f349.n109.z1.fidonet.org!tom.rollins
- From: tom.rollins@p5555.f349.n109.z1.fidonet.org (tom rollins)
- Newsgroups: sci.crypt
- Subject: Another DES Method
- Message-ID: <711821102.F00005@blkcat>
- Date: 22 Jul 92 15:15:25 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Lines: 23
-
- I don't have access the this (sci.crypt) Newsgroup
- so please ONLY respond to my question via E-mail
- "tom.rollins@p5555.f349.n109.z1.fidonet.org"
-
- My Question:
- I know about the several DES encryption methods:
- ECB - Electronic Code Book
- CBC - Cipher Block Chaining
- CFB - Cipher Feed Back
- OFB - Output Feed Back
- MAC - Message Authentication Code
- KSG - Key Stream Generator
-
- All these methods encrypt data 64 bits at a time.
- It has been suggested that I use a 1 bit or 8 bit
- CFB (Cipher Feed Back). Now I understand how to
- feed back 1 or 4 bits, But don't understand how
- it would improve the basic method. And it would
- add a lot of processing time to the encryption /
- decryption.
-
- Thanks....
- Tom Rollins
-