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- Newsgroups: sci.crypt
- Path: sparky!uunet!mcsun!sunic!liuida!isy!isy!rosa
- From: rosa@isy.liu.se (Ronnie Sahlberg)
- Subject: What algorithm to use in my project...?
- Message-ID: <rosa.725121321@isy>
- Sender: news@isy.liu.se (Lord of the News)
- Organization: Dept of EE, University of Linkoping
- Date: 23 Dec 92 14:35:21 GMT
- Lines: 32
-
- Hi, crypto-men .
-
- I am currently working on a hw/sw project where we need to use some crypto
- stuff. My problem is that I dont know which cryptation algoritm to use.
- It is very important that the cryptation is HARD (impossible) to crack,
- otherwise our whole project is useless.
- The following restrictions apply to this project :
- 1, Each message to encrypt is 10 to 15 bytes.
- 2, We can only allow about 5.000 assembler instructions to decrypt
- each message.
- 3, Some messages will be sent to just one reciever, and be decrypted
- and interpreted in said reciever. Some messages will be sent
- to several (all) units and will be recieved, decrypted and interpreted
- by all these units.
- Thus we must keep the decryption algorithm in 'sync' on all units.
- To make things worse, we MUST also be prepared for that some units
- can be disconnected and thus miss some messages and still work
- (not be out of sync) when the uni9t is turned on again.
- 4, The chip will probably be built in the US but sold/used in
- europe. So I cant use an algorithm that may not be exported outside
- the US.
-
- If anyone has any suggestions on which algorithm to use I would be
- very glad. If you know what cryptation algorithm to use, please let me
- know, and if you also know where to get source and documentation to said
- algorithm, GREAT!
-
- Please do not respond by e-mail, my e-mail server is _UNRELIABLE_
- at the moment and will probably not start working properly until late january.
-
- ronnie s , ronnie@lysator.liu.se
-
-