SerDES Lane Scrambling with Dynamic Permutation Switching
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Solution Overview
Problem
Conventional data transfer systems are vulnerable to man-in-the-middle attacks, where malicious devices intercept and tamper with data by disguising as legitimate endpoints, compromising data security.
Innovation Solution
Implementing lane scrambling and re-ordering mechanisms in a SerDES stack using selectors and a permutation shift orchestrator to dynamically change lane assignments, making it difficult for adversaries to determine the correct data order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional data transfer systems are used, then data transfer is simple and straightforward, but the system is vulnerable to man-in-the-middle attacks and data interception
Solution Approach 1:
The patent applies dynamics by making the lane assignment configuration changeable over time. The system transitions from static lane assignments to dynamic reconfiguration, where lane mappings can be updated during operation. This dynamic nature prevents adversaries from predicting or intercepting data streams, as the assignment patterns continuously evolve, thereby resolving the security simplicity contradiction.
Solution Approach 2:
The patent changes the parameter of lane assignment configuration from fixed to variable. By allowing the configuration to be modified based on time, triggers, or other conditions, the system creates uncertainty for potential attackers. This parameter change enables the same physical infrastructure to provide enhanced security without requiring fundamentally new hardware, thus improving reliability while managing complexity.
2Reliability
If lane scrambling and re-ordering mechanisms are implemented, then data security against man-in-the-middle attacks is enhanced, but the system complexity increases
Solution Approach 1:
The system implements self-service through autonomous configuration management. The selector components automatically apply lane scrambling and re-ordering based on pre-established configurations without requiring manual intervention. The system self-manages the complexity of lane assignments, applying transformations consistently and maintaining security properties while reducing operational burden, thus balancing enhanced integrity with manageable complexity.
Solution Approach 2:
The patent introduces intermediary configuration structures that mediate between the raw data streams and the scrambled output. These intermediary layers handle the complexity of lane mapping and re-ordering, isolating the security function from the data transmission path. By using these mediators, the system achieves enhanced data integrity while containing complexity within dedicated configuration management components rather than throughout the entire system.
3Reliability
If dynamic configuration of lane assignments is implemented, then security against data interception is improved, but the time required for configuration changes increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple lane assignment patterns before they are needed. The system prepares and stores configuration templates that can be rapidly deployed when security updates are required. This advance preparation eliminates the need for time-consuming real-time configuration calculations, allowing the system to switch between security modes quickly while maintaining strong data confidentiality protection.
Solution Approach 2:
The system implements periodic action through time-based configuration changes. Instead of continuous reconfiguration, the system updates lane assignments at scheduled intervals or based on periodic triggers. This approach provides sufficient security through regular updates while minimizing the cumulative time impact on data transmission. The periodic nature allows the system to balance security enhancement with operational efficiency, avoiding excessive time loss.
Data Source
AI summary
Apparatuses, methods, and systems are provided for lane scrambling over network communication channels. The apparatus includes processing circuitry configured to configure a first selector and a second selector according to a first configuration. The processing circuitry is further configured to transmit a plurality of pre-computed lane permutations to the first selector and transmit a selector signal to the first selector, wherein the selector signal indicates a pre-computed lane permutation from the plurality of pre-computed lane permutations for use as the first configuration. The processing circuitry is further configured to direct transmission of a response signal from the second selector to the first selector.