Reduced Signature Generation for Secure Data Transmission
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Solution Overview
Problem
Conditional access systems face challenges in minimizing bandwidth usage for secure transmission of CA information without compromising security, as longer security signatures provide greater security but require more bandwidth, leading to potential diminishment of content service quality and quantity.
Innovation Solution
The method involves encrypting a data block using a private key and generating a hash of the signature to create a reduced signature, which is transmitted along with the data block. This reduced signature is then verified upon receipt by re-encrypting the data block and comparing it to the original reduced signature, ensuring authenticity without excessive bandwidth consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full security signatures are attached to each message, then security is improved, but bandwidth consumption increases
Solution Approach 1:
The patent extracts only the essential verification component from the full security signature by applying a hash function to generate a reduced signature. This reduced signature contains the critical authentication information while being significantly smaller in size, thus reducing bandwidth consumption while maintaining security verification capability
Solution Approach 2:
The patent transforms the security signature from its original full-size form into a compressed hash-based reduced signature. This parameter change in signature representation maintains the cryptographic verification function while dramatically reducing the data volume that needs to be transmitted over the network
2Reliability
If longer security signatures are used, then security is improved, but bandwidth usage increases
Solution Approach 1:
The patent extracts only the essential verification component from the full security signature by applying a hash function to generate a reduced signature. This reduced signature contains the critical authentication information while being significantly smaller in size, thus reducing bandwidth consumption while maintaining security verification capability
Solution Approach 2:
The patent creates a condensed copy of the security signature information through hashing. The reduced signature is a derived representation that preserves the authentication essence of the original signature while occupying minimal bandwidth space for transmission
Data Source
AI summary
Systems and methods for securing data are disclosed. A method for securing data can comprise processing a data block to generate a signature, processing the signature to generate a reduced signature, transmitting the data block to a recipient, and transmitting the reduced signature to the recipient.