Microsoft introduces a significant enhancement to Windows 11’s BitLocker, aiming to boost data encryption speed and security. This update shifts critical encryption tasks to dedicated hardware components, reducing system load and improving overall performance.
BitLocker serves as a comprehensive encryption tool that protects all stored data on laptops and PCs. Traditionally, it runs automatically at startup, relying on the Trusted Platform Module (TPM) chip to safeguard encryption keys from unauthorized access.
As storage technologies advance, particularly with the rise of NVMe drives, the conventional CPU-based BitLocker encryption started impacting system performance. Intensive CPU usage during encryption can slow down demanding activities such as gaming or video editing.
To address these challenges, Microsoft now leverages hardware acceleration embedded in specific system-on-a-chip (SoC) designs. This offloads encryption processing from the CPU to specialized hardware, resulting in smoother and faster operation under heavy workloads.
According to Microsoft, devices with NVMe drives and SoCs supporting crypto offload will activate hardware-accelerated BitLocker by default. This mode employs the robust XTS-AES-256 encryption algorithm, ensuring both speed and high security standards.
This hardware-based approach not only enhances performance but also strengthens security. Encryption keys are stored and managed directly by the hardware, minimizing exposure to vulnerabilities that may exist in CPU or system memory environments.
The new BitLocker version is available starting with Windows 11 update 24H2 released in September, with plans to extend support in the coming 25H2 release. Initial compatibility focuses on Intel vPro platforms and Intel Core Ultra Series 3 processors.
Microsoft aims to broaden hardware-accelerated BitLocker support to include chips from other manufacturers in future updates. Users can verify activation by running a command prompt query; if the encryption method shows “hardware accelerated,” the updated BitLocker is active.
This move reflects Microsoft’s commitment to modernizing encryption technology as storage hardware evolves, enhancing the balance between data protection and system efficiency. The integration of hardware acceleration in BitLocker marks a critical step toward securing sensitive data without compromising user experience.
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