Filter
Top Products
MM23772, Rev. B
46
7.27.1 Automatic Encryption
For automatic encryption, a system administrator will select the talk group to be encrypted at the interface
to the UAS. Once the talk groups have been selected and identified as secure, credentials for key
generation are generated automatically by the system and provisioned to authorized users. This process
requires that authorized users login to the network and be authenticated. Encryption keys require no
manual handling and are never sent “in the clear” over any network interface or airlink.
7.27.1.1 Using Automatic Encryption
1. Locate the talk group that has been encrypted at the system administrator level.
2. “Pls Login” appears in the display (unless the keypad was used to log in).
3. Login normally by entering your User ID and Password.
If a user is engaged in a call on a talk group encrypted at the system administrator level, “SECURE” will
appear in the display if the user is logged into that talk group.
If a secure call is in progress elsewhere and the user has not logged in, the main display will alternate
between no access “NO ACC” and the alias of the radio that is currently engaged in the secure call. The
alias only shows if the active talk group matches the received talk group, otherwise only the talk group
name is displayed.
7.27.2 Manual Encryption (P7270 Only)
Two or more users can manually encrypt a call, if enabled, without an established encrypted talk group. A
pre-determined “key or code” is required. Note that while a user is engaged in an encrypted call, users
within the talk group that are not encrypted can still make standard voice calls on that talk group. The
encrypted user can hear the standard unencrypted calls, but cannot respond while still manually
encrypted.
Manual key entry only affects the currently selected talk group. All available talk groups within the
current profile may be independently encrypted. Encryption keys are lost if the profile is changed.
The key must be pre-determined by the users prior to making a manually encrypted call on
a talk group and is entered into the radio using the keypad. For 128 bit encryption, this key
is between 1 and 16 digits. For 256 bit encryption, this key is between 17 and 32 digits.
7.27.2.1 Using Manual Encryption
1. Press *32 on the keypad.
2. Enter the key (1 – 16 digits for 128 bit encryption; 17 – 32 digits for 256 bit encryption).
3. Press #.
4. To end manual encryption, press *33.
If a user is engaged in a call on a talk group that has been manually encrypted at the radio level, “Secure”
will appear in the display.
If a secure (encrypted) call is in progress, and the user has not entered the key, the display will alternate
between no access “No Access” and the alias of the radio that is currently engaged in the secure call.
Once the user has terminated manual encryption “Unsecure” will appear in the display for a brief interval.