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interesting P25 article
Posted: Thu Aug 11, 2011 5:17 am
by batdude
Re: interesting P25 article
Posted: Thu Aug 11, 2011 5:33 am
by bezking
Wasn't P25 radio authentication supposed to encrypt the packet header? Or am I off base?
As for the clear/secure issue, disable the switch, slave everything to secure, and OTAR those users who lost the keys... Right?
Re: interesting P25 article
Posted: Thu Aug 11, 2011 7:56 am
by escomm
bezking wrote:Wasn't P25 radio authentication supposed to encrypt the packet header? Or am I off base?
As for the clear/secure issue, disable the switch, slave everything to secure, and OTAP those users who lost the keys... Right?
They lose their key somehow and 1) can't call their team and 2) can't ask for an OTAR.
Re: interesting P25 article
Posted: Thu Aug 11, 2011 1:47 pm
by d119
*sigh*. A high power transmitter on the control channel output or on the conventional repeater output in close enough proximity to an operation will also render the subscribers useless.
This is a non-issue in my mind, except for the encryption being switched off.
Re: interesting P25 article
Posted: Fri Aug 12, 2011 9:28 pm
by mr.syntrx
bezking wrote:Wasn't P25 radio authentication supposed to encrypt the packet header? Or am I off base?
Nope. Makes life great for an adversary engaged in the 70 year old discipline of SIGINT known as traffic analysis.
Re: interesting P25 article
Posted: Thu Aug 18, 2011 3:50 pm
by mr.syntrx
d119 wrote:*sigh*. A high power transmitter on the control channel output or on the conventional repeater output in close enough proximity to an operation will also render the subscribers useless.
This is a non-issue in my mind, except for the encryption being switched off.
The most successful attack is the kind where your adversary doesn't know he is under attack. This fits that bill nicely.