Using Kvl 4000 In Otar Systems; Setting Up The Kvl For Kmf Operations - Motorola KVL 4000 User Manual

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Using KVL 4000 in OTAR Systems

This chapter is applicable if your KVL is configured to support KMF operation.
The Motorola Over-the-Air Rekeying (OTAR) system is a secure communications system in which encryption keys
can be sent to subscriber units via radio transmission in addition to directly connecting a KVL to a radio to load
keys. OTAR provides flexibility and convenience in managing and administering encryption keys.
One of the infrastructure components in an OTAR system is the Key Management Facility (KMF). The KMF is a
Windows NT-based computer that is responsible for:
• Storing and managing the encryption keys for an OTAR system
• Initiating key transmissions to radios
Before using the KVL to perform tasks in an OTAR system, program several parameters, as described in
7.1 Setting Up the KVL for KMF Operations, page
The KVL can interface with the KMF to provide the following functions:
• Transfer the encryption keys required by the OTAR system from the KVL to the KMF – You load the
required keys into the KVL, connect the KVL to the KMF via a standard key load cable, and transfer the
keys (one at a time) to the KMF for storage and management (see
The KMF then transfers encryption keys to target devices via OTAR.
• Download encryption keys from the KMF into the KVL – Two methods are available for transferring
encryption keys when OTAR cannot be performed, such as for radios that do not support OTAR, radios that
are out of range, or radios that have not yet been initialized. The download from the KMF to the KVL
may be performed either by direct cable connection or through a modem connection. The two methods of
downloading keys are:
– Individual keys are downloaded to the KVL key database which are then loaded directly into target
devices (see
that you know the CKRs of the keys in the KVL key database.
– With the use of the Store and Forward ASTRO
usually containing encryption keys – are downloaded to the KVL that is in turn used to update target
devices. This operation does not require that you know the CKRs of the keys in the KVL database. This
simplifies the key loading procedure. (See

7.1 Setting Up the KVL for KMF Operations

Before using your KVL to work with a KMF, program several KMF-related parameters.
Prerequisites:
Your KVL supports KMF operation.
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Chapter 4 KVL 4000 – Loading Encryption Keys into Target
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4.1 Loading a Selected Key, page
®
25 feature, Key Management Messages (KMMs) –
7.2.4 Updating a Target Device, page
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Devices). This method requires
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