1994-04-21 - Re: cryptophone ideas
Header Data
From: “Perry E. Metzger” <perry@snark.imsi.com>
To: pcw@access.digex.net (Peter Wayner)
Message Hash: 0b1381c05b402ef217ae9ddc51ff7eaff26fbd83f0750a72420d13cc83845ad0
Message ID: <9404212338.AA00416@snark.imsi.com>
Reply To: <199404212330.AA09243@access1.digex.net>
UTC Datetime: 1994-04-21 23:38:28 UTC
Raw Date: Thu, 21 Apr 94 16:38:28 PDT
Raw message
From: "Perry E. Metzger" <perry@snark.imsi.com>
Date: Thu, 21 Apr 94 16:38:28 PDT
To: pcw@access.digex.net (Peter Wayner)
Subject: Re: cryptophone ideas
In-Reply-To: <199404212330.AA09243@access1.digex.net>
Message-ID: <9404212338.AA00416@snark.imsi.com>
MIME-Version: 1.0
Content-Type: text/plain
Peter Wayner says:
> How hard is it to reprogram the DSP that comes with a cellular
> phone right now? I've never opened one up. Can you just unsolder
> a rom, read it, insert your own code for DH key exchange, add
> some encryption, burn a new ROM and have a secure phone?
You would also have to open up the base station for the cell, unsolder
its roms, read them, insert your own code for DH key exchange, add
some encryption, and put it back, and I suspect that the cellular
vendor would get mad at you.
Perry
Thread
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Return to “Phil Karn <karn@qualcomm.com>”
- 1994-04-21 (Thu, 21 Apr 94 16:31:10 PDT) - Re: cryptophone ideas - pcw@access.digex.net (Peter Wayner)
- 1994-04-21 (Thu, 21 Apr 94 16:38:28 PDT) - Re: cryptophone ideas - “Perry E. Metzger” <perry@snark.imsi.com>
- 1994-04-26 (Mon, 25 Apr 94 22:24:35 PDT) - Re: cryptophone ideas - Phil Karn <karn@qualcomm.com>
- 1994-04-26 (Mon, 25 Apr 94 22:30:07 PDT) - Re: cryptophone ideas - Phil Karn <karn@qualcomm.com>