Is there a way to view what flavor of encryption is being used on conventional frequencies? I thought there was a code that corresponded to the various algos but when I run -v4 I get a series of binary strings after LSD. How can I see the KID and algo?
Courtesy of the Daniels Electronics 'P25 Training Guide':
Algorithm ID (ALGID)
The Header Code Word and Encryption Synchronization (LDU2)
contain the 8 bit ALGID field. The ALGID identifies the encryption
algorithm used in the P25 system. The ALGID is entered through
a Key Management Facility or Key Loader when entering encryption
keys.
The ALGID’s that have been defined for Type 1 algorithms are:
$00 ACCORDION 1.3
$01 BATON (Auto Even)
$02 FIREFLY Type 1
$03 MAYFLY Type 1
$04 SAVILLE
$41 BATON (Auto Odd)
$80 Unencrypted message (no encryption algorithm)
$81 DES-OFB encryption algorithm
$82 2-key triple DES encryption algorithm
$83 3-key triple DES encryption algorithm
$84 AES encryption algorithm
Key ID (KID)
The Header Code Word and Encryption Synchronization (LDU2)
contain the 16 bit KID field. The KID identifies the specific encryption
key for use when multiple encryption keys have been loaded into the
encryption modules. The KID is also used for single encryption key
systems. The typical default KID for clear or secure systems is $0000.
The KID is entered through a Key Management Facility or Key Loader
when entering encryption keys.