Intel White Paper - Bluetooth Security: Recommended Encryption Key Size
Summary
This technical guide provides crucial security recommendations for implementing high-strength encryption keys in Bluetooth systems utilizing Intel products. Designed for embedded system developers and hardware architects, this white paper details best practices required to meet industry standards and prevent potential security vulnerabilities like brute force attacks. It ensures that engineers can configure their designs by employing the maximum allowable key sizes, guaranteeing robust and secure connectivity for critical applications.
Page 1 Text Content
Intel® Bluetooth® Security – Encryption Key Size Recommendation White Paper August 2019 Revision 1.0
Page Summary Contents For Intel White Paper - Bluetooth Security: Recommended Encryption Key Size
Manual Details
| Brand | Intel |
|---|---|
| Pages | 8 |
| File Size | 455.00 KB |
| Published | June 03, 2026 |
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Frequently Asked Questions
What is the minimum required key strength for Level 4 Security Mode services?
Devices must enforce an encryption key with at least 128-bit equivalent strength for all services requiring Security Mode 4, Level 4.
What range of encryption key sizes do Intel Bluetooth Controllers support?
They support encryption key sizes ranging from 1 byte to 16 bytes in length.
How should I verify the established encryption key size after a secure connection?
The Host can check the key size using either the HCI_Read_Encryption_Key_Size command or a vendor-specific method.
What is the core recommendation for establishing a secure Bluetooth connection?
Intel recommends that all components—Controller, Host, and Profiles/Services—employ the highest level of encryption available.