The Microsoft wireless keyboard uses XOR encryption with a key derived from the MAC address, which makes it easier for remote attackers to obtain keystroke information and inject arbitrary commands via a nearby wireless device, as demonstrated by Keykeriki 2.
Weaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.