Wireless Key Derivation From Decoded Information Blocks
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining secure communications due to the vulnerability of physical channels to eavesdropping, leading to potential interception and decoding of data by unauthorized devices.
Innovation Solution
Wireless devices derive security keys from previously communicated information blocks using a secure key algorithm, enabling secure communication without generating additional overhead by encoding subsequent transmissions with keys generated from these blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices transmit security keys explicitly through the communication channel, then the security key can be communicated reliably between devices, but the overhead of the communication increases and the channel becomes more vulnerable to interception
Solution Approach 1:
The patent enables each wireless device to independently generate the security key locally using a key derivation function applied to decoded information blocks from the communication channel. Both devices derive the same key without one device transmitting it to the other, making the system self-sufficient in key generation and eliminating the need for key transmission.
Solution Approach 2:
The patent introduces a key derivation function as an intermediary mechanism that transforms publicly available decoded information blocks into secure keys. This intermediary process allows secure key generation from non-sensitive data, avoiding the need to transmit sensitive key material while maintaining security.
2Reliability
If wireless devices use previously communicated information blocks for key derivation, then security is enhanced without additional overhead, but the devices must successfully decode and store these information blocks
Solution Approach 1:
The patent makes the decoded information blocks serve dual purposes: they are used for application data and simultaneously serve as the basis for security key derivation. This multi-functionality eliminates the need for separate key transmission while enhancing security, as the same decoded blocks that carry information also generate the security keys.
3Reliability
If wireless devices derive keys from decoded information blocks, then the same key can be identified by both devices without explicit communication, but the information blocks must be successfully decoded and available at both ends
Solution Approach 1:
The patent performs key derivation from decoded information blocks before actual secure communication begins. By deriving keys in advance from already-decoded blocks, the system ensures both devices have the necessary keys ready before sensitive communications start, eliminating timing conflicts and ensuring key availability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. For instance, a first wireless device may receive, from a second wireless device, a first message, the first message including one or more first information blocks encoded based on a first key. The first wireless device may transmit, to the second wireless device, an indication that the one or more first information blocks have been successfully decoded. The first wireless device may communicate, with the second wireless device, a second message, where the second message includes information that is encoded based on a second key that is derived from at least a portion of the decoded one or more first information blocks.