Article View: sci.crypt
Article #2956Re: Tropez Digital Cordless Phone Encrypted?
From: James R Ebright
Date: Wed, 27 Jan 1993 09:25
Date: Wed, 27 Jan 1993 09:25
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In article <1993Jan26.180913.25305@hubcap.clemson.edu> wstef@hubcap.clemson.edu (W. Gregg Stefancik) writes:
>I have a Tropez 900DX corless phone which uses some form of digital
>voice transmission. From reading the manual I see that the digital
>stream is supposed to be encrypted as well. Does anyone know how this
>phone does it's thing? Supposedly it uses one of 64K keys which it
>randomly selects each time it is being charged.
>
...deletion...
I don't know about this specific model, but in general this
class of phone is much superior to the regular fm cordless
phone. All you can hear is the digital hash when listening.
These phones also usually do frequency hopping, but normally in
response to noise and not for security.
But be careful, many of these phones claim to be encrypted --
but close examination of the claim shows the manufacter believes
digitization is encryption. (This Tropez might be different)
NB. In the US, it requires *no* court order to tap your cordless
phone. If you want to broadcast in the clear, anyone who wants
to can listen.
--
Jim Ebright (james.ebright@osu.edu)
Heisenberg may have been here.
Fax # 614-785-0292. Tel # 614-785-0282. Beeper # 614-646-1093
>>> All kids can be educated -- even yours and mine. <<<
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<1993Jan27.092527.19912@magnus.acs.ohio-state.edu>Path:
arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!sgiblab!spool.mu.edu!agate!usenet.ins.cwru.edu!magnus.acs.ohio-state.edu!jebrightReferences:
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Newsgroups: sci.crypt Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!sgiblab!spool.mu.edu!agate!usenet.ins.cwru.edu!magnus.acs.ohio-state.edu!jebright From: jebright@magnus.acs.ohio-state.edu (James R Ebright) Subject: Re: Tropez Digital Cordless Phone Encrypted? Message-ID: <1993Jan27.092527.19912@magnus.acs.ohio-state.edu> Sender: news@magnus.acs.ohio-state.edu Nntp-Posting-Host: top.magnus.acs.ohio-state.edu Organization: The Ohio State University References: <1993Jan26.180913.25305@hubcap.clemson.edu> Date: Wed, 27 Jan 1993 09:25:27 GMT Lines: 28