Xref: utzoo sci.electronics:8285 sci.crypt:2405 Path: utzoo!censor!perle!scott From: scott@perle.UUCP (Scott Allen) Newsgroups: sci.electronics,sci.crypt Subject: Re: Telephone privacy gadgets Add: Cryptography Keywords: Telephone, scrambler, security, secrecy, cryptography, privacy, cordless Message-ID: <751@perle.UUCP> Date: 20 Oct 89 16:54:16 GMT References: <799@mccall.uucp> <776@ariel.unm.edu> <790@ariel.unm.edu> Reply-To: scott@perle.UUCP (Scott Allen) Organization: Perle Systems Limited Scarborough, Ontario, Canada Lines: 26 In article <790@ariel.unm.edu> ee5391aa@hydra.unm.edu.UUCP (Duke McMullan n5gax) writes: >In article otto@tukki.jyu.fi (Otto J. Makela) >writes: >>Preventation: does anyone know of cheap but reasonably reliable scramblers ? [stuff deleted here] >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'm not too concerned about scrambling the signal on the lines. What does bother me is that when I use a cordless phone, anyone close by can listen in to the radio signal without tapping the line. Producing a cordless phone with encryption between the handset and the base may be a good incentive for volume production of such a chip. (A switch could be provided so that two of the same type of phones could also encrypt end to end.) -- ========= * Scott Allen * UUCP: P E R L E * Perle Systems Ltd. * ...!uunet!mnetor!perle!scott ========= * Scarborough, Ontario, Canada *