Encrypted GSM phone
David A. Burgess
dburgess at jcis.net
Tue Apr 10 17:15:02 UTC 2012
Yes, and in most networks that CSD connection is a kind of beacon, screaming to the network operator, "Hey! Look at me! I'm using a cryptophone! Pay extra special attention to my movements and calling patterns!"
On Apr 10, 2012, at 12:04 AM, Jama Solomo wrote:
>> Yes, the idea has been raised many times before.
>> The problem is that in a lot of network the voice is going to be
>> decompressed in the network, transferred as PCM and then recompressed.
> The crypt phones, which are used from our politicians today,
> establishing a CSD connection for voice crypt transmission.
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