Android Security Internals: An In-Depth Guide to Android's Security Architecture

Android Security Internals: An In-Depth Guide to Android's Security Architecture

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There are more than one billion Android devices in use today, each one a potential target. Unfortunately, many fundamental Android security features have been little more than a black box to all but the most elite security professionals—until now.

In Android Security Internals, top Android security expert Nikolay Elenkov takes us under the hood of the Android security system. Elenkov describes Android security architecture from the bottom up, delving into the implementation of major security-related components and subsystems, like Binder IPC, permissions, cryptographic providers, and device administration.

You’ll learn:

• How Android permissions are declared, used, and enforced
• How Android manages application packages and employs code signing to verify their authenticity
• How Android implements the Java Cryptography Architecture (JCA) and Java Secure Socket Extension (JSSE) frameworks
• About Android’s credential storage system and APIs, which let applications store cryptographic keys securely
• About the online account management framework and how Google accounts integrate with Android
• About the implementation of verified boot, disk encryption, lockscreen, and other device security features
• How Android’s bootloader and recovery OS are used to perform full system updates, and how to obtain root access

With its unprecedented level of depth and detail, Android Security Internals is a must-have for any security-minded Android developer.

About the Author
Nikolay Elenkov has been working on enterprise security–related projects for more than 10 years. He became interested in Android shortly after the initial public release and has been developing Android applications since version 1.5. His work has led to the discovery and correction of significant Android security flaws. He writes about Android security on his highly regarded blog, nelenkov.blogspot.com.

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Спойлер: Содержание книги

Table of contents
Chapter 1: Android’s Security Model

• Android’s Architecture
• Android’s Security Model

Chapter 2: Permissions

• The Nature of Permissions
• Requesting Permissions
• Permission Management
• Permission Protection Levels
• Permission Assignment
• Permission Enforcement
• System Permissions
• Shared User ID
• Custom Permissions
• Public and Private Components
• Activity and Service Permissions
• Broadcast Permissions
• Content Provider Permissions
• Pending Intents

Chapter 3: Package Management

• Android Application Package Format
• Code signing
• APK Install Process
• Package Verification

Chapter 4: User Management

• Multi-User Support Overview
• Types of Users
• User Management
• User Metadata
• Per-User Application Management
• External Storage
• Other Multi-User Features

Chapter 5: Cryptographic Providers

• JCA Provider Architecture
• JCA Engine Classes
• Android JCA Providers
• Using a Custom Provider

Chapter 6: Network Security and PKI

• PKI and SSL Overview
• JSSE Introduction
• Android JSSE Implementation

Chapter 7: Credential Storage

• VPN and Wi-Fi EAP Credentials
• Credential Storage Implementation
• Public APIs

Chapter 8: Online Account Management

• Android Account Management Overview
• Account Management Implementation
• Google Accounts Support

Chapter 9: Enterprise Security

• Device Administration
• VPN Support
• Wi-Fi EAP

Chapter 10: Device Security

• Controlling OS Boot-Up and Installation
• Verified Boot
• Disk Encryption
• Screen Security
• Secure USB Debugging
• Android Backup

Chapter 11: NFC and Secure Elements

• NFC Overview
• Android NFC Support
• Secure Elements
• Software Card Emulation

Chapter 12: SElinux

• SELinux Introduction
• Android Implementation
• Android 4.4 SELinux Policy

Chapter 13: System Updates and Root Access

• Bootloader
• Recovery
• Root Access
• Root Access on Production Builds