simple two-key encryption

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Article #3243

#3243

From: Dean Radin
Date: Thu, 20 Nov 1986 20:03

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Anyone know of a simple scheme or program suitable for a microcomputer 
and written in a language like C or Basic whereby data can be encrypted
with one key and later decrypted with another key?

The application is a computer-based experiment on a Macintosh.  
I need to ensure to some reasonable degree that any data produced 
during the experiment is not alterable or even readable by a clever 
person who might be able to disassemble a compiled program to discover the
encrypting key.  Later I would like to decrypt the data
using a key known only to me.

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!rutgers!princeton!mind!dean
From: dean@mind.UUCP (Dean Radin)
Newsgroups: sci.crypt
Subject: simple two-key encryption
Message-ID: <227@mind.UUCP>
Date: Thu, 20-Nov-86 15:03:15 EST
Article-I.D.: mind.227
Posted: Thu Nov 20 15:03:15 1986
Date-Received: Thu, 20-Nov-86 23:19:05 EST
Distribution: net
Organization: Cognitive Science, Princeton University
Lines: 10
Keywords: for micros