Xref: utzoo sci.electronics:8360 sci.crypt:2428 Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!netnews.engin.umich.edu!caen.engin.umich.edu!barr From: barr@caen.engin.umich.edu (William Barr) Newsgroups: sci.electronics,sci.crypt Subject: Re: Telephone privacy gadgets Add: Cryptography Keywords: Telephone, scrambler, security, secrecy, cryptography, privacy Message-ID: <4675a0db.1285f@maize.engin.umich.edu> Date: 26 Oct 89 14:56:00 GMT References: <799@mccall.uucp> <776@ariel.unm.edu> <790@ariel.unm.edu> <1989Oct19.143522.7686@ux1.cso.uiuc.edu> Reply-To: barr@caen.engin.umich.edu (William Barr) Followup-To: sci.electronics Organization: caen Lines: 21 In article <1989Oct19.143522.7686@ux1.cso.uiuc.edu> kadie@herodotus.cs.uiuc.edu.UUCP (Carl M. Kadie) writes: >>In article otto@tukki.jyu.fi (Otto J. Makela) >>writes: >>>Preventation: does anyone know of cheap but reasonably reliable scramblers ? > >In article <790@ariel.unm.edu> ee5391aa@hydra.unm.edu.UUCP (Duke McMullan n5gax) writes: > ... >>Cheap and hard to defeat -- I don't think it exists, but it could, and the >>technology is HERE TODAY! It actually wouldn't be hard to integrate the whole >>schmeer, including D/A, A/D, key management, (en/de)cryption, and an automatic >>slicer-dicer for carrots all on the same chip. The thing that would make it >>cheap is volume production, which probably won't happen, at least not soon. I've seen a device that fits over your phone advertised in this last summer's issues of High Times (what? You don't read HT?) . Basically you have one at each end and it fits over the handset. It has a keypad and allows some fairly large number of possible codes. The person on the other end must be using the same code. I'm pretty certain it was digital. I believe that each handset device was about $100. It seemed fairly reasonable.