University:
College
Course:
College Engineering
Academic year:

2023
Views:

485

Pages:

2
Author:

Dipin K.

Bluetooth Security The way that the Bluetooth Radio system is used in mobile devices and the type of data carried on these devices (e.g., a corporate mobile computer) makes security an extremely important factor. While most wireless systems will claim that being a spread spectrum radio provides security, the volumes projected for Bluetooth radios eliminate this barrier. As such, link layer and application layer security are part of the basic Bluetooth radio requirements. At a link layer, the Bluetooth radio system provides Authentication, Encryption, and Key Management of the various keys involved. Authentication involves the user providing a Personal Identification Number (PIN) that is translated into a 128-bit link key that can be authenticated ina one or two-way direction. Link layer securityy architecture The link layer security architecture provides a number of authentication schemes and a flexible encryption scheme that allows radios to negotiate for key length. This is important, as radios from different countries will be talking to each other. Security policies in these countries will dictate maximum encryption key lengths. Bluetooth radios will negotiate to the smallest common key length for the link. The Bluetooth architecture also supports authorization of different services to upper software stacks. For example, when two computers have created a Bluetooth link to exchange business cards, authorization must be created to extend these services The Bluetooth security architecture relies on PIN codes for establishing trusted relationships between devices. While not practical to go through all the combinations of uses of PIN codes, it should be noted that once a trusted pairing is established between devices, these codes can be stored within the device to allow more automatic/simple connections. The key to Bluetooth simplicity will be establishing the trusted relationship between commonly used devices.