Ericsson M-RK I, M-RK II system/scan security policy

SECURITY POLICY

FOR THE

M-RK I AND M-RK II SYSTEM/SCAN (AEGIS/DES)

HANDHELD PERSONAL PORTABLE

TWO-WAY FM RADIO

MRK I M-RK II

SYSTEM/SCAN

Table of Contents

Table of Contents..............................................................................................................................................................2

1. Introduction...................................................................................................................................................................3

2. Scope...............................................................................................................................................................................3

3. Module Description......................................................................................................................................................4

3.1. Module Interfaces..................................................................................................................................................4

3.2. Module Components.............................................................................................................................................4

4. Software/Firmware Capabi lities...................................................................................................................................5

4.1. Radio Control Processor (RCP)............................................................................................................................5

4.2. Interrupt Control Processor (ICP)........................................................................................................................5

4.3. AEGIS DSP (ADI)..................................................................................................................................................5

4.4. Firmware ..................................................................................................................................................................5

5. Roles & Services ...........................................................................................................................................................5

5.1. Crypto-Officer Services.........................................................................................................................................6

5.2. User Services..........................................................................................................................................................6

5.3. Status Functions....................................................................................................................................................6

5.4. Key Management...................................................................................................................................................7

6. Secure Operation...........................................................................................................................................................7

6.1. AEGIS Clear, Digital, and DES Operation...........................................................................................................7

6.1.1. Clear Mode...................................................................................................................................................7

6.1.2. AEGIS Digital Mode...................................................................................................................................7

6.1.3. AEGIS Private Mode...................................................................................................................................8

6.1.4. Error Messages ..........................................................................................................................................8

Ericsson Security Policy

1. Introduction

The M-RK II System/Scan (AEGIS) and M-RK I handheld personal portable two-way FM radio is a
high-quality, high performance FM radio. The radio is synthesized and operates in both trunked (Ericsson
EDACS™) and conventional communications systems. The trunked mode allows selection of either a
communications group or an individual radio within a system. Both the selected group and the individual
radio are secured through AEGIS digital signaling and DES encryption.

Trunked operation is where a set of radio frequency channels is used by multiple user groups. By using
high speed digital data, the radio goes to an unused channel when a call is initiated and will only respond to
calls in the same user group. In this way, conversation privacy between user groups is assured. This
operation is very similar to a cellular phone call.

A conventional mode of operation is communicating on radio channels allocated for conventional use.
Conventional use or operation is where a radio channel (transmit/receive) is allocated for conventional
(non-trunked) use and may be manually selected by the operator. The user selects a channel and directly
communicates on that channel. A channel is a transmit/receive radio frequency pair. Think of this mode as
“Walkie-Talkie” mode.

A trunked group consists of several users with a common group identification (GID). A radio may have
several groups but the selected group determines whom the unit can call at any specific time. In trunked
mode, a set of groups that communicate on a set of channels is called a system. In the conventional mode, a
system is a set of channels. A system may consist of all trunking groups and channels, all conventional
channels, or a mixture of both.

2. Scope

This document will define the security policy for the M-RK II System/Scan and M-RK I radio. This
policy will define the cryptographic module, cr ypto-officer roles, user roles, and key management functions.

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