Harris Encryption Part or All

[TexScan780D]

My local government is moving from an EDACS to Harris P25 Phase II 5 site. Since the PD want to go to full encryption, I was told that the whole system has to be encrypted not partial encrypted.

So a Harris P25 Phase II 5 site can not be partial encrypted?

 

[ninfreak]

all data will have to be encrypted but they can pick what talk groups are clear or encrypted

 

[TexScan780D]

all data will have to be encrypted but they can pick what talk groups are clear or encrypted

Okay, but what do you mean by all data? So talk groups can be encrypted or in the clear.

 

[tampabaynews]

Encryption can be enabled on a talkgroup by talkgroup and/or user by user basis.

 

[TexScan780D]

Encryption can be enabled on a talkgroup by talkgroup and/or user by user basis.

"all data will have to be encrypted " Does this mean the control channel has to be encrypted or some other data?

 

[Thunderknight]

Talk groups can be encrypted on a talk group by talk group basis.

I have no idea what the other poster means by data will have to be encrypted, but the control channel will be unencrypted and talk groups encrypted on a talk group by talk group basis.

 

[Radioman96p71]

Everything will function like a normal P25 system, just the talkgroups with encryption will change. There is currently nothing in the P25 spec that allows for encryption or otherwise obfuscation of the control channel. Data over the P25 network can be encrypted as well i believe, but that would typically be MDT or GPS data.

 

[rescue161]

As far as Harris systems go, they have two ways to implement encryption. 1) System wide - End Users have no access to turn on/off encryption, or 2) User Selectable - Users can turn on/off encryption at will on a case by case basis per talkgroup.

The system that we use is system wide. End users have no control on whether or not they want to use encryption as it is always on and cannot be turned off.

 

[DisasterGuy]

Rescue161 is close but still not quite there. Talkgroups are encrypted on a per talkgroup basis (but that can be all talkgroups). Additionally, radios can ne programmed to allow encryption to be toggled, forced on or a combination of the two.

Sent from my SCH-I545 using Tapatalk

 

[rescue161]

Yes, that is true, but it can be implemented system wide, as in all TGs, which is the way our system is set up. If the system is set up for system wide encryption, then even if the radio is programmed to toggle on/off the encryption, transmissions will still be encrypted no matter which position the switch is in.

 

[johnls7424]

Most systems are setup to have just talkgroups encrypted. On systems that have system wide encryption almost always you will see mutual aid style TDMA talkgroups for interop. Usually when their system wide encryption too all talkgroups that are encrypted will share 4-5 encryption key ID's/keys. Systems that operate by talkgroup to talkgroup with encryption can still hear clear voice but can only transmit data and their voice VIA encrypted voice. That is common on my state-wide talkgroup (NJICS). A person running encryption will attempted to key into a conversation between two people in the clear. The people in the clear only hear encrypted voice packets but the person whose encrypted can hear it clear as well. It's weird but sometimes that's how it works