Service Manual

December 2008 5300 ES Series Mobile Radio Service Manual 1-8
General Information
1.5.1 FIPS 140-2 Approved Encryption
All encrypted 5300 ES Series mobile radio models are FIPS certified for the DES-OFB
and AES encryption modes. Encryption on analog channels is not FIPS certified. FIPS
140-02 is a Federal Information Processing Standard recently approved by the United
States Secretary of Commerce. This standard specifies Federal security requirements for
cryptographic modules for a wide range of applications and environments.
1.5.2 Over-the-Air-Rekeying (OTAR)
Encryption keys are loaded into the radio by OTAR (Over-the-Air-Rekeying) using a Key
Management Facility (KMF) and/or a handheld keyloader such as the EFJohnson
Technologies Subscriber Management Assistant (SMA) or Motorola KVL 3000 Plus with
the AES option.
The keyloader is connected directly to the radio using an interconnect cable, and it loads
DES, DES-OFB, and AES keys. Currently, OTAR can be used to load DES-OFB keys on
Project 25 conventional channels. Refer to Section 10 of the Operating Manual for your
radio for more OTAR information.
1.5.3 Key Retention
Note The 5300 ES Series mobile radio has a security feature (push-button switch S1 on the
logic board) that automatically erases the encryption keys when the bottom cover is
removed (except when Infinite Key Retention is programmed as follows).
If Infinite Key Retention Infinite Key Retention is programmed, the keys are maintained
in memory indefinitely, even without power applied. If it is not programmed, the radio
must be connected to an unswitched power source to preserve the encryption keys in
memory. However, a storage capacitor (C173, 0.22 F) maintains the 5-volt supply (and the
encryption keys) for approximately eight hours if power is temporarily lost.
1.6 Typical Performance Specifications.
This section contains specifications intended for use in testing and servicing this mobile
radio. For current advertised specifications, refer to the specification sheet available from
your sales representative. Values are typical and are subject to change without notice.