Article View: sci.crypt
Article #394Re: Deterring plaintext attacks
From: Leonard Erickson
Date: Thu, 05 Nov 1992 00:07
Date: Thu, 05 Nov 1992 00:07
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gilchr@ee.ualberta.ca (Andrew Gilchrist) writes: >What are theoretic ways to deter a plaintext attack? >i.e. The opponent is given two ciphertext messages, the plaintext of >the first message, and the encryption method. >Now, obviously the longest key in the world will not help. >How does one protect the key, so that it can be reused. You *can't*. Reusing keys *will* compromise the key if the enmey has the known plaintext. -- Leonard Erickson leonard@qiclab.scn.rain.com CIS: [70465,203] 70465.203@compuserve.com FIDO: 1:105/51 Leonard.Erickson@f51.n105.z1.fidonet.org (The CIS & Fido addresses are preferred)
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arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!sdd.hp.com!cs.utexas.edu!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!uwm.edu!ogicse!psgrain!qiclab!leonardReferences:
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Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!sdd.hp.com!cs.utexas.edu!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!uwm.edu!ogicse!psgrain!qiclab!leonard From: leonard@qiclab.scn.rain.com (Leonard Erickson) Newsgroups: sci.crypt Subject: Re: Deterring plaintext attacks Message-ID: <1992Nov5.000740.1755@qiclab.scn.rain.com> Date: 5 Nov 92 00:07:40 GMT Article-I.D.: qiclab.1992Nov5.000740.1755 References: <gilchr.720707527@ee.ualberta.ca> Reply-To: 70465.203@compuserve.com Organization: SCN Research/Qic Laboratories of Tigard, Oregon. Lines: 22