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- Path: sparky!uunet!dtix!darwin.sura.net!mips!swrinde!elroy.jpl.nasa.gov!lll-winken!ptavv.llnl.gov!oberman
- From: oberman@ptavv.llnl.gov
- Newsgroups: comp.protocols.tcp-ip
- Subject: Re: SMTP mail
- Message-ID: <1992Jul29.083024.1@ptavv.llnl.gov>
- Date: 29 Jul 92 16:30:24 GMT
- References: <92209.190519KKEYTE@ESOC.BITNET> <92211.092548KKEYTE@ESOC.BITNET>
- Sender: usenet@lll-winken.LLNL.GOV
- Lines: 62
- Nntp-Posting-Host: ptavv.llnl.gov
-
- In article <92211.092548KKEYTE@ESOC.BITNET>, KKEYTE@ESOC.BITNET (Karl Keyte) writes:
- >
- > 14rticle <1992Jul29.021534.6708@mp.cs.niu.edu>, rickert@mp.cs.niu.edu (Neil
- > Rickert) says:
- >>
- >>In article <92209.190519KKEYTE@ESOC.BITNET> Karl Keyte <KKEYTE@ESOC.BITNET>
- >>writes:
- >>>
- >>>The SMTP has recently been removed at our site because of its well-known
- >>>security hole.
- >>
- >> Would you like to enlighten us as to the nature of this "well known
- >>security hole".
- >>
- >> It is well known that email can be forged. Most people don't consider
- >>this a security problem, although it may present an identification
- >>problem. If you consider email forgery a security hole, then I presume
- >>you have also shut off all paper mail, which can just as easily be
- >>forged.
- >>
- >
- > & that's not a security hole? It is if you want to believe mail that you
- > receive. Paper mail is usually signed. The point is, SMTP is stupidly
- > simple (as we all know) in it's "authentication". My question still
- > stands.
-
- It's hardly a security hole in SMTP. It is a nearly universal problem in
- networking and common to virtually all protocols. This INCLUDES paper mail. I
- get at least a dozen letters and "official memos" a day of which probably one a
- week is signed.
-
- SMTP is rapidly becoming the lingua franca of electronic mail. With the
- deployment of MIME, it is likely to displace X.400 in short order. To remove
- SMTP because of the possibility of forgery is cutting off ones node to spite
- ones face. It's not going away and it doesn't look like anything will replace
- it in the next several years. And, because it works so well, noone is even
- looking at a replacement (except OSI folk who are pushing X.400).
-
- Now, lets try to look at fixing the problem instead of shooting the messenger!
- The only real way to do this is PEM. There are a number of RFCs on the subject
- (1113, 1114, and 1115. PEM allows mail to be "signed" digitally to preclude
- forgery. It also allows encryption to gaurantee privacy. PEM is available
- commercially from at least one source, Trusted Information Systems. While this
- is not exportable, I know there are foreign sources which eliminate the
- silliness of the US Government.
-
- Please note that all of this still uses SMTP.
-
- And, since the vast volume of mail requires neither privacy or authentication,
- I doubt that most E-Mail will use privacy options for some time to come. So
- cutting off SMTP merely cuts off your users from 99% of the world. If my sysop
- did this in the name of security, I'd wring his neck. (No possibility of this
- since I am the sysop.) It's simply stupid.
-
- And, while you're at it, ban paper mail too. After all, it works when it's not
- signed, so it may be forged!
-
- R. Kevin Oberman Lawrence Livermore National Laboratory
- Internet: koberman@llnl.gov (510) 422-6955
-
- Disclaimer: Don't take this too seriously. I just like to improve my typing
- and probably don't really know anything useful about anything.
-