HDCP Authentication Packet Merging for Faster Encrypted Transmission
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Solution Overview
Problem
The existing HDCP authentication process introduces extra delays and overheads when later versions (e.g., HDCP 2.1, HDCP 2.2, HDCP 2.3) are downward compatible with HDCP 2.0, delaying encrypted data transmission.
Innovation Solution
A communication method that allows for combined sending of initialization and information packets when both network elements support a version later than HDCP 2.0, reducing the duration and packet overheads required for authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If later-version HDCP (2.1, 2.2, 2.3) performs downward compatibility with HDCP 2.0 authentication process, then compatibility between different HDCP versions is improved, but authentication delay and packet overheads increase
Solution Approach 1:
The patent combines the initialization packet and the first information packet into a single combined packet for transmission. This merging eliminates the need for separate packet exchanges, reducing authentication overheads and delays while maintaining compatibility between different HDCP versions through proper packet structure design
2Adaptability or versatility
If later-version HDCP (2.1, 2.2, 2.3) performs downward compatibility with HDCP 2.0 authentication process, then compatibility between different HDCP versions is improved, but packet overheads increase
Solution Approach 1:
The patent merges multiple authentication packets into a single combined packet, reducing the total quantity of packets exchanged during authentication. This approach maintains all necessary authentication information while eliminating redundant packet structures, thereby reducing packet overheads
3Reliability
If separate packet exchanges are used for initialization and capability information, then authentication completeness is ensured, but authentication time increases
Solution Approach 1:
The patent combines initialization and capability information into a single authenticated packet structure that maintains all necessary authentication elements. This merging reduces the number of sequential packet exchanges while ensuring complete authentication through proper inclusion of all required fields
Solution Approach 2:
The patent performs preliminary organization of authentication data into a combined packet structure before transmission. By pre-assembling all necessary authentication information (initialization data, capability information, and verification elements) into a single packet, the system eliminates multiple sequential exchanges and reduces overall authentication time
Data Source
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AI summary
A communication method, apparatus, and system are provided. The method includes: A first network element obtains first indication information, where the first indication information indicates that at least one version in a high-bandwidth digital content protection HDCP version supported by a second network element is not earlier than a first preset version; or the first indication information indicates an HDCP version supported by the second network element, and at least one version in the HDCP version supported by the second network element is not earlier than the first preset version; and the first network element sends a first authentication message to the second network element based on the first indication information, where the first authentication message includes a first random number and capability indication information of the first network element. The communication method in this application may be applied to an intelligent driving device such as a new energy vehicle or an intelligent vehicle, so that packet overheads and duration required when an HDCP transmit end and an HDCP receive end perform authentication can be reduced. This helps the HDCP transmit end and the HDCP receive end quickly enter an encrypted data transmission procedure.