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Mobility Capability Package Mobility March 26 Capability Package 2012 This document defines the 2nd release of earlier phases of the Enterprise Secure VoIP Mobility Architecture and focuses on the architectural components of providing a Secure VoIP capability using commercial grade products. Version 1.2 Table of Contents 1 Overview of Enterprise Mobility ................................................................................................... 8 1.1 Goals...................................................................................................................................... 8 1.2 Description ............................................................................................................................ 9 1.3 Provisioning, Operations, and Management ...................................................................... 10 1.4 Component Requirements – Thresholds and Objectives ................................................... 11 2 Overview of Smartphone Secure Voice over Internet Protocol (VoIP) on Cellular Networks .... 12 2.1 Goals.................................................................................................................................... 12 2.2 Description .......................................................................................................................... 13 2.3 Threat Environment ............................................................................................................ 14 2.4 Security Principles ............................................................................................................... 14 2.5 Mobile User and Wireless Access ....................................................................................... 14 2.6 Mobile User to Mobile User ................................................................................................ 15 3 Operating System and Applications Mobile Device Security ...................................................... 17 3.1 Overview ............................................................................................................................. 17 3.2 Operation ............................................................................................................................ 18 3.3 Approach ............................................................................................................................. 18 3.3.1 Architecture .................................................................................................................... 18 3.3.2 Security Relevant Components ....................................................................................... 22 3.3.3 Inter-relationship to Other Elements of the Secure VoIP System .................................. 33 3.4 Gap Analysis ........................................................................................................................ 33 3.4.1 System Overview ............................................................................................................. 33 3.5 Risk ...................................................................................................................................... 33 3.5.1 Threats to the System ..................................................................................................... 33 3.5.2 Risks to the System ......................................................................................................... 34 3.6 References .......................................................................................................................... 35 4 Carrier Services Connections ...................................................................................................... 36 4.1 Overview ............................................................................................................................. 36 4.2 Description .......................................................................................................................... 36 4.3 Approach ............................................................................................................................. 37 2 4.3.1 Architecture .................................................................................................................... 37 4.3.2 Security Components ...................................................................................................... 43 4.3.3 Inter-relationship to Other Elements of the Secure VoIP System .................................. 45 4.4 Gap Analysis ........................................................................................................................ 46 4.4.1 Secure Roaming .............................................................................................................. 46 4.4.2 Network Authentication ................................................................................................. 46 4.4.3 Audit System ................................................................................................................... 47 4.4.4 Secure Identity Module ................................................................................................... 47 4.4.5 Secure Over-the-Air Provisioning Server ........................................................................ 47 4.4.6 Quality of Service ............................................................................................................ 48 4.5 Risk ...................................................................................................................................... 48 4.5.1 Rogue Base-Station ......................................................................................................... 48 4.5.2 Rogue Carrier .................................................................................................................. 49 4.5.3 Rogue Manufacturer/Supply Chain Compromise ........................................................... 50 4.5.4 Geo-location .................................................................................................................... 50 4.5.5 Frequency Jamming ........................................................................................................ 51 4.5.6 Passive Collection ............................................................................................................ 51 4.6 References .......................................................................................................................... 52 5 Enterprise Mobility Infrastructure .............................................................................................. 53 5.1 Overview ............................................................................................................................. 53 5.2 Description .......................................................................................................................... 54 5.2.1 Rationale for Security Design .......................................................................................... 55 5.2.2 Security Approach in the Enterprise Mobility Infrastructure ......................................... 56 5.3 Approach ............................................................................................................................. 57 5.3.1 Architecture .................................................................................................................... 57 Intrusion Detection System (IDS)/Intrusion Prevention System (IPS) .................................... 57 Firewall (multiple) ................................................................................................................... 57 Collection of audit log records received from the mobile device ........................................... 58 5.3.2 Security Relevant Components ....................................................................................... 59 5.4 Gap Analysis ........................................................................................................................ 88 3 5.5 Risks..................................................................................................................................... 89 5.5.1 Threats and Risks to the System ..................................................................................... 89 5.5.2 Risk Mitigations to the System ........................................................................................ 89 5.6 References .......................................................................................................................... 90 6 Secure Voice over IP (SVoIP) Application .................................................................................... 92 6.1 Overview ............................................................................................................................. 92 6.2 Description .......................................................................................................................... 92 6.3 Approach ............................................................................................................................. 93 6.3.1 Architecture .................................................................................................................... 93 6.3.2 Security Relevant Components ....................................................................................... 94 6.3.3 Inter-relationship to Other Elements of the Secure VoIP System .................................
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