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- Newsgroups: sci.crypt
- Path: sparky!uunet!gatech!usenet.ins.cwru.edu!agate!dog.ee.lbl.gov!hellgate.utah.edu!csn!news.den.mmc.com!thor!jhull
- From: jhull@vulcan-gw.den.mmc.com (Jeff Hull)
- Subject: What PKE is good for (Was: Anti-spoofing protocol?)
- Message-ID: <1993Jan5.202511.9398@den.mmc.com>
- Summary: Assymetric encryption has value.
- Sender: news@den.mmc.com (News)
- Nntp-Posting-Host: thor.den.mmc.com
- Reply-To: jhull@vulcan-gw.den.mmc.com
- Organization: Martin Marietta Astronautics Group
- References: <1993Jan4.215027.17258@netcom.com>
- Date: Tue, 5 Jan 1993 20:25:11 GMT
- Lines: 33
-
- In article 17258@netcom.com, rcain@netcom.com (Robert Cain) writes:
- |>This all assumes that you have a secure means of getting your public key
- |>to the other or an authenticated one. Both seem equivalent in the end
- |>to swapping a secret key to me. This makes me question the fundamentals
- |>of PK actually.
-
- Although the early claims that PKE has the capability of establishing
- a secure message channel without requiring the use of a secure key-exchange
- channel have since been proven false, I suggest that PKE still offers
- considerable value due to its asymmetric nature.
-
- Asymmetric encryption (AE) provides the capability to digitally sign messages
- in a way that "cannot" be forged while allowing the recipient to verify the
- signature. Since the same key-pair can also be used to exchange secure
- messages with the same "individual," my key management problem is more
- tractable than if I had to maintain two keys (one for secure messages, which
- could be symmetric or asymmetric, & one for suthentication, which *must* be
- asymmetric). In addition, the degree & kind of protection which must be
- provided for the public part of an asymmetric key is *much* more easily
- provided than that which must be provided for a symmetric key.
-
- I suggest these are non-trivial advantages.
-
-
- --- --- --- --- ---
- _ _
- /_ / ) / ) Jeff Hull j.hull@vulcan-gw.den.mmc.com
- //_) -/- -/- 1544 S. Vaughn Cir
- /_/ \_/ / / Aurora, CO 80012 303-977-1061
-
- No matter where you go ... there you are.
- #include <standard.disclaimer.h>
-
-