[TrunkCom] Nextel Digital system

[Wayne M H]

On Sat, 13 Apr 2002 01:38:03 -0400, Marcel <marcelrf@bellsouth.net>
wrote:

>Wayne M H wrote:
>
>> On Sat, 13 Apr 2002 01:13:12 -0400, Marcel <marcelrf@bellsouth.net>
>> wrote:
>>
>> >From IFR:
>> >
>> ><SNIP>
>> >"The 2975 can simultaneously monitor the uplink and
>> >downlink data streams and display the information sent and
>> >received in Project 25 formatted data fields. This permits
>> >checking radio programming codes, etc."
>> >
>> >Project 25- Definitions-
>> >
>> >KID =3D Key Identifier identifies which key is in use for
>> >encryption.
>> >
>> >ALGID =3D Algorithm Identifier
>>
>> And, as mentioned before, this is useless info without the actual key.
>> So you know which key out of a group. Big deal!
>
>nope- read the key on the downlink
>

Marcel, you must know something about encryption. The encryption key
for DES, or any serious encryption type, is never sent in the
datastream. And besides, do you think IFR would sell equipment which
violates US law?

You cannot get the encryption key off the air, then use it to keyload
into a radio or piece of equipment. What's the point of encryption
then?