Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Bus encryption is the use of encrypted program instructions on a data bus in a computer that includes a secure cryptoprocessor for executing the encrypted instructions. Bus encryption is used primarily in electronic systems that require high security, such as Automated teller machines, TV set-top boxes, and secure data communication devices such as digital police radios. Bus encryption can also mean encrypted data transmission on a data bus from one processor to another processor. For example from the CPU to a GPU, which does not require input of encrypted instructions. Such bus encryption is used by the Microsoft operating system Vista to protect certificates, BIOS, passwords, and program authenticity. PVP-UAB (Protected Video Path) provides bus encryption of premium video content in PCs as it passes over the PCIe bus to graphics cards to enforce Digital rights management.

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