A Video Interface with End-point Security
نویسندگان
چکیده
A video interface with end-point security is able to protect the confidentiality of electronic information up until the scan-line conversion process. Data stored in the video RAM remains encrypted, and this feature can be used to support design rights management. We describe the implementation of an end-pointsecure character-based VGA video interface. Video data confidentiality is maintained by integrating a stream-cipher algorithm in the scan-line conversion hardware. As a result, even the low-level system software that interfaces with the secure VGA interface cannot decrypt the video data. In addition, our interface supports a security protocol to reprogram new keys at runtime into the video interface in a trustworthy fashion. The video interface and the protocol can be combined to build a secure tunnel that extends from a video data source up until the VGA connector. We describe the design and implementation of this concept in an FPGA prototype, and discuss potential applications of this interface.
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