Encryption Mobility; Encryption Mmi; Aie Key Storage; Deleting User Keys - Motorola MTP830 S Product Information Manual

• Seamless security class changes to SC3G.
The SwMI can support the group OTAR feature. Where supported, the SwMI groups radios that share the same set of
cryptographic key material into a specific crypto management group (CMG). Any radio belonging to the same CMG
is addressed using a CMG GTSI. The primary purpose of the addressing is to transmit group OTAR messages
conveying TM-SCK, DM-SCK and/or GCK. Any radio that supports TM-SCK group OTAR, DM-SCK group OTAR
or GCK group OTAR is assigned to a specific CMG.
Each CMG has a designated specific GSKO. The system deploys over the air a CMG GSKO (and CMG GTSI) to
each radio belonging to the CMG. The GSKO is used as the sealing key for TM-SCK, DM-SCK, and GCK, when
sent across the air interface. The SwMI can perform scheduled transmissions of the future TM-SCK addressed to each
CMG. The radio requesting a TM-SCK triggers the site to schedule additional transmissions of the requested TM-
SCKs. These transmissions are addressed to either the CMG GTSI that the radio belongs to or its ITSI.
The SwMI can perform scheduled background transmissions of the future GCKs addressed to each CMG. The radio
requesting for a given GCK triggers the site to schedule additional transmissions of the current and the future versions
associated of the requested GCK. These transmissions are addressed to either the CMG GTSI that the radio belongs to
or its ITSI.
The SwMI can perform scheduled background transmissions of the current and the future DM-SCK addressed to each
CMG. The radio requesting for a DM-SCK triggers the site to schedule additional transmissions of the requested DM-
SCK. These transmissions are addressed to either the CMG GTSI that the radio belongs to or its ITSI.

Encryption Mobility

A Class 2 or Class 3 radio can operate on a lower class SwMI (depending on configuration). A radio that is
provisioned not to allow operation on a lower class SwMI, does not register on such a cell.
A Class 2 or Class 3 radio moves to a cell that supports an SCK/CCK/GCK that the radio possesses, applies AIE to
the registration PDU. If no acknowledgment is received, the radio sends the registration in clear.

Encryption MMI

A Class 2 or Class 3 radio that is involved in a clear call provides a visual and an audible indication informing that the
call is not encrypted (if enabled by the service provider).

AIE Key Storage

The radio stores all the keys, SCK/CCK/DCK/GCK, in a sealed manner in non-volatile memory of the radio.
However, they are not stored in the codeplug.
The radio supports loading of the SCK keys manually using the Key Variable Loader (KVL).
By using a special key combination, you can delete the cipher keys in the radio. Depending on configuration, you
may erase either all keys or only the short-term keys.

Deleting User Keys

Prerequisites: The user key deletion is enabled in the codeplug.
Procedure:
1 Verify that the radio is turned on.
2 Press the following key sequence: S
S B 2.
IDE UTTON
Caution:
B 1, S B 1, S
IDE UTTON IDE UTTON
Services and Features | 43
B 1, S B 2, S
IDE UTTON IDE UTTON
| |
B 2,
IDE UTTON
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