Dual-Key Encryption for Secure Content Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional content transmitting/receiving systems fail to effectively protect copyrighted digital content during transmission, as the use of shared encryption keys among multiple receivers allows unauthorized decoding and copying of content.
Innovation Solution
A content transmitting and receiving system that employs a dual-key encryption method, where a common key is shared among all receivers for rendering purposes, while each receiver has a unique move key for secure content transfer, ensuring that content is deleted from the transmitter after transmission and can only be decrypted by the intended receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a common encryption key is shared among multiple receivers for efficient content distribution, then communication efficiency is improved, but copyright protection is compromised as multiple receivers can decode and copy the content
Solution Approach 1:
The encryption key is segmented into two distinct keys: a common key shared among multiple receivers for rendering content, and a unique move key assigned to each receiver for content transfer. This segmentation allows the system to simultaneously achieve communication efficiency through the common key while maintaining copyright protection through the unique move key that prevents unauthorized copying.
2Ease of operation
If content is transmitted with encryption keys distributed to multiple receivers, then content can be decoded by multiple receivers, but this prevents normal content moving and fails to protect copyright
Solution Approach 1:
Different quality levels of access rights are assigned to different receivers through the dual-key system. The common key provides rendering capability to all receivers, while the unique move key provides transfer capability only to the authorized receiver. This local differentiation of access rights enables content decoding while preventing unauthorized copying and ensuring proper copyright protection.
Data Source
AI summary
According to one embodiment, a transmitting method transmits a start request for an authentication and key exchange from at least one of receivers to the transmitter, performs an authentication and key exchange for at least one of a first key common to the receivers and a second key peculiar to the at least one of the receivers, and encrypts the content by using a key shared by the transmitter and the at least one of the receivers to transmit the encrypted content to the at least one of the receivers.