Every Android device used in the workplace carries valuable business information—from emails and customer records to confidential documents and enterprise applications. As organizations increasingly rely on Android devices, protecting this data from unauthorized access has become a critical security requirement. Data breaches often begin with a lost, stolen, or compromised endpoint.
For organizations managing Android devices, encryption serves as the first line of defense by ensuring sensitive information remains unreadable without proper authentication. Over the years, Android's encryption architecture has evolved from Full-Disk Encryption (FDE) to more advanced technologies such as File-Based Encryption (FBE), Metadata Encryption, Adiantum, and Hardware-Wrapped Keys, providing stronger security while improving device usability.
This blog explores the different types of Android encryption, how they work, why they matter, and how Mobile Device Management (MDM) solutions like SureMDM help organizations enforce encryption policies across enterprise devices.
What is Android Encryption?
Android encryption is a security mechanism that converts data stored on a device into unreadable ciphertext using cryptographic algorithms. Only users or applications with the appropriate authentication credentials can decrypt and access the information.
Encryption protects data stored on the device, ensuring that sensitive information remains inaccessible even if the device is lost, stolen, or accessed without authorization. Today, encryption is enabled by default on most modern Android devices and forms a core component of Android's security architecture.
Why is Android Encryption Important?
Enterprise and personal devices store a significant amount of sensitive information, making encryption a critical line of defense against cyber threats.
Android encryption helps organizations:
- Protect corporate and personal data from unauthorized access.
- Reduce the impact of lost or stolen devices.
- Meet compliance requirements such as GDPR, HIPAA, and PCI DSS.
- Secure sensitive business applications and files.
- Support secure remote work and BYOD deployments.
- Strengthen overall endpoint security.
Types of Android Encryption
Android uses multiple encryption technologies, each designed to address different security requirements.
- Full-Disk Encryption (FDE)
What It Is
Full-Disk Encryption (FDE) was introduced in Android 5.0 and was used on Android devices before File-Based Encryption became the standard for new devices. It encrypts the entire user data partition using a master key that is itself protected by the user's lock screen credential and hardware-backed key management (where supported).
How It Works
- The complete storage is encrypted with one master key.
- Users must unlock the device before any encrypted data becomes accessible.
- The device uses the encryption key to unlock access to the encrypted user-data partition after the required authentication step.
Why It Matters
Although FDE provided strong protection for stored data, its limitations—including slower boot times and lack of flexibility—led Android to adopt File-Based Encryption as the standard.
- File-Based Encryption (FBE)
What It Is
File-Based Encryption (FBE), introduced in Android 7.0, encrypts files and filenames using separate encryption keys and policies, allowing different categories of data to become available at different stages of the device boot and unlock process.
How It Works
FBE separates storage into two areas:
- Device Encrypted (DE): Available immediately after the device boots.
- Credential Encrypted (CE): Accessible only after the user unlocks the device.
Files are encrypted using keys derived from credential-encrypted (CE) or device-encrypted (DE) storage policies, allowing different data to become available at different stages of device unlock.
Why It Matters
FBE enables critical services such as alarms, phone calls, and accessibility features to function before device unlock while providing stronger, per-file security and better support for work profiles and multiple users.
- Metadata Encryption
What It Is
Metadata Encryption protects information about files—such as filenames, directory structures, timestamps, and file sizes that could otherwise reveal sensitive information.
How It Works
Metadata is encrypted separately using device-specific encryption keys and works alongside File-Based Encryption to provide comprehensive protection.
Why It Matters
Metadata encryption protects information such as directory layouts, file sizes, permissions, and timestamps that would otherwise remain exposed.
- Adiantum
What It Is
Adiantum is an encryption method supported on devices running Android 9 and higher, particularly those whose CPUs lack Advanced Encryption Standard (AES) hardware acceleration.
How It Works
Instead of relying on hardware-accelerated AES encryption, Adiantum uses an optimized software-based cryptographic approach to provide strong security with minimal performance impact.
Why It Matters
Adiantum enables modern encryption even on budget devices, ensuring strong data protection without requiring specialized hardware.
- Hardware-Wrapped Keys
What It Is
Hardware-wrapped keys allow storage encryption keys to remain in a protected, wrapped form when handled by software. Supported hardware performs the operations needed to use these keys, reducing the exposure of raw storage keys to software.
How It Works
Android uses hardware-backed key-management components to protect wrapped storage keys. The keys remain protected when handled by software, while the hardware and associated security components help control how they can be used.
Why It Matters
By reducing the exposure of raw storage keys to software, hardware-wrapped keys add another layer of protection for encrypted data, particularly against attacks that compromise the operating system.
How MDM Helps Enforce Android Encryption
While Android provides powerful built-in encryption, organizations need centralized management to ensure encryption policies are consistently enforced across all devices.
Mobile Device Management (MDM) solutions like SureMDM enable IT administrators to:
- Enforce encryption during device enrollment.
- Verify encryption status across managed devices.
- Block non-compliant devices from accessing corporate resources.
- Configure password and authentication policies.
- Remotely lock or wipe lost and stolen devices.
- Monitor encryption compliance through centralized dashboards.
- Apply security policies using Android Enterprise management.
By combining Android's native encryption with centralized device management, organizations can strengthen security while simplifying administration.
Best Practices for Android Encryption
To maximize Android device security, organizations should:
- Use devices that support modern Android encryption standards, including File-Based Encryption and Metadata Encryption where supported.
- Enforce strong passwords or biometric authentication.
- Use Android Enterprise for enterprise device management.
- Keep devices updated with the latest security patches.
- Store encryption keys using hardware-backed security whenever available.
- Monitor encryption compliance using an MDM solution.
- Remotely wipe lost or compromised devices.
Final Thoughts
Android's encryption architecture has evolved significantly, providing multiple layers of protection through File-Based Encryption, Metadata Encryption, Adiantum, and Hardware-Wrapped Keys. Together, these technologies help protect sensitive information while maintaining device performance and usability.
For enterprises, encryption alone is only part of the security strategy. By combining Android's built-in encryption capabilities with SureMDM, IT teams can enforce security policies, monitor compliance, and protect corporate data throughout the device lifecycle. As mobile threats continue to evolve, implementing both strong encryption and centralized endpoint management is essential for maintaining a secure Android environment.
