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From: adamj@thoth8.berkeley.edu.BERKELEY.EDU
Newsgroups: sci.crypt
Subject: Re: Secrecy Shibboleth
Message-ID: <5515@jade.BERKELEY.EDU>
Date: Mon, 19-Oct-87 02:28:31 EDT
Article-I.D.: jade.5515
Posted: Mon Oct 19 02:28:31 1987
Date-Received: Tue, 20-Oct-87 01:46:51 EDT
References: <497@auscso.UUCP> <807@mips.UUCP> <533@auscso.UUCP>
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Reply-To: adamj@widow.berkeley.edu (Adam J. Richter)
Organization: University of California, Berkeley
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In article <533@auscso.UUCP> johnm@auscso.UUCP (John B. Meaders, Jr.) writes:

>I do have "call waiting," however, the beeps I talk about are not call waiting
>beeps.  In fact, they are more like clicks.  Occasionly my phone will ring
>for a split second, I will go and pick it up, and someone will be there (no
>it isn't a caller since the phone only beeped a second and stopped).  Once
>it was a phone company guy checking the network out (so he said), other times
>nobody would answer me.  Also, during long distance calls I will hear beeps
>(although this could be switching equipment, I don't use AT&T on my voice line
>for long distance).  Anybody else experience this kind of thing?
>-- 
>John B. Meaders, Jr.  1114 Camino La Costa #3083, Austin, TX  78752
>ATT:  Voice:  +1 (512) 451-5038  Data:  +1 (512) 371-0550
>UUCP:   ...!ut-ngp!auscso!jclyde!john
>                          \johnm


	My cheap push-button phone would let out a half assed
ring now and then, last summer, when I was in New Jersey.  Have you
tried a different phone?

	Being bugged:  I understand that there are numbers that
you can call that will give you a rising tone that either stays high or
drops low and starts rising again depending upon whether there are
any extra listeners.  I've tried the numbers with different, but consistent,
results from different a variety of places.

	I used to have a list of four such numbers and I used to know
which response meant the line was "bugged" and which one meant not.
Obviously, these sorts of detectors can't detect everything.  E.g., to
the best of my knowledge there's now way to tell whether a satallite
signal is being received by an extra antenna either near the satallite
Or near the receiving ground station.
Adam J. Richter			adamj@widow.berkeley.edu
				....!ucbvax!widow!adamj
(415)642-7762