SWRA846 July   2025 CC2642R-Q1

 

  1.   1
  2.   Abstract
  3. 1Analysis of Bluetooth Pairing Technology Principles
    1. 1.1 LE Legacy Pairing and LE Secure Connections Pairing
    2. 1.2 Analysis of Association Mode Security Characteristics
    3. 1.3 Privacy Protection and Address Management
  4. 2Common Issues in Pairing Encryption
    1. 2.1 Integrity Check Fault—MIC Verification Failure (MIC failure)
    2. 2.2 Abnormal Key Negotiation—DHKey Verification Failure (DHKey check fail)
    3. 2.3 Key Management Defect—PIN/Key Loss (PIN or Key missing)
      1. 2.3.1 Key Missing During Pairing Phase
      2. 2.3.2 LTK Missing During Encryption Phase
  5. 3A Solution for Encryption Resource Conflicts
    1. 3.1 Environment Selection and Configuration
    2. 3.2 Implementing AES-256 Encryption and Decryption Using TinyAES Library
    3. 3.3 System-Level Optimization Exploration
      1. 3.3.1 Memory Allocation Inspection
      2. 3.3.2 Padding Processing and Thread Safety
  6. 4Conclusion
  7. 5References

4 Conclusion

This paper succinctly analyzes the core principles and typical fault modes of the Bluetooth Low Energy (BLE) pairing security mechanism, systematically constructs a full-link diagnostic framework from protocol logic to hardware resource management for some common difficult problems, and provides design recommendations for system design developers in combination with instances. Concurrently, targeting the common encryption resource conflict dilemma among several difficult pairing encryption problems of the TI CC2642R-Q1 chip, a software-alternative high-freedom solution is proposed to achieve resource competition circumvention. It provides system design developers with the feasibility of coping with system design requirements using a software-hardware collaborative encryption pairing scheme.