Article View: sci.crypt
Article #1711bizarre question...
From: Marcus J. Ranum
Date: Thu, 23 May 1991 00:54
Date: Thu, 23 May 1991 00:54
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metzger@watson.ibm.com (Perry E. Metzger) writes: > >You have done nothing by simply implementing the algorithm. ONLY USE >OF, OR SALE OF, A PATENTED INVENTION IS ACTIONABLE. Can you prove that I did, in fact, encrypt my data with an RSA scheme, in court, without my being forced to incriminate against myself? The intuitive argument: the way to prove that in fact I had been using RSA to encrypt my data would be to decrypt it, thereby proving that you know the encryption scheme. Otherwise I can just claim that I used a one-time pad, and that you're just reading what you want to see out of the noise. Am I totally off base? My uderstanding of cryptography is limited, but I thought the better cryptosystems tend to make the ciphertext look like random noise. How, then, do you tell? (code-breakers must have a reasonable array of tools that can certainly imply what kind of system you used, but can you *PROVE* it to a jury of ignorami?) mjr.
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!europa.asd.contel.com!noc.sura.net!haven.umd.edu!decuac!hussar.dco.dec.com!mjr From: mjr@hussar.dco.dec.com (Marcus J. Ranum) Newsgroups: sci.crypt,gnu.misc.discuss,comp.org.eff.talk Subject: bizarre question... Keywords: RSA patent rpem Message-ID: <1991May23.005453.4406@decuac.dec.com> Date: 23 May 91 00:54:53 GMT References: <1991May16.201709.3086@msuinfo.cl.msu.edu> <1991May20.183038.9967@watson.ibm.com> Organization: Digital Equipment Corp., Washington Ultrix Resource Center Lines: 22