Random Key Derivation for Secure Communication
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Solution Overview
Problem
Conventional methods for establishing and distributing symmetric keys are burdensome, time-consuming, and prone to security vulnerabilities, especially when short key lifecycles are involved, leading to increased operational overhead and costs.
Innovation Solution
A method for secure communication using random key derivation, where an initial key is combined with seed bits using a key derivation function to generate new symmetric keys, eliminating the need for continuous key distribution processes and enhancing security by requiring knowledge of the initial key, seed bits, and key derivation function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional key distribution methods are used to establish new symmetric keys when lifecycle expires, then security is maintained, but operational overhead and time consumption significantly increase
Solution Approach 1:
The system performs preliminary action by establishing a shared initial key before the key lifecycle expires. This initial key is then used to derive multiple subsequent symmetric keys through key derivation functions, eliminating the need for repeated key distribution processes when keys expire. The preliminary establishment of the initial key enables continuous secure communication without time-consuming re-distribution.
Solution Approach 2:
The system implements self-service by enabling each party to autonomously derive new symmetric keys using the shared initial key and key derivation functions. Instead of relying on external key distribution infrastructure or manual intervention, the parties self-generate secure keys locally, significantly reducing operational overhead and time consumption while maintaining security.
2Reliability
If symmetric keys are assigned short lifecycles to enhance security, then security vulnerabilities are reduced, but the frequency of key reestablishment increases operational overhead and costs
Solution Approach 1:
The initial key serves multiple functions: it acts as a parent key for deriving multiple child symmetric keys, enabling the system to support short key lifecycles without requiring separate key distribution events. This multi-functionality allows the initial key to generate a sequence of secure keys, reducing operational overhead while maintaining the security benefits of short-lived symmetric keys.
Solution Approach 2:
The system changes parameters by transforming a single long-lived initial key into multiple short-lived symmetric keys through key derivation functions. This parameter transformation enables the use of short key lifecycles for symmetric keys (enhancing security) while the initial key remains stable, thereby reducing the frequency of key reestablishment operations and lowering operational overhead.
3Reliability
If manual key distribution processes are used involving key management teams and physical mailing, then key security is controlled, but the process becomes burdensome and time-consuming
Solution Approach 1:
The system replaces the mechanical manual key distribution process with an automated cryptographic key derivation mechanism. Instead of physical mailing and manual handling of key components, the system uses key derivation functions to automatically generate symmetric keys from the initial key. This substitution eliminates the burdensome manual processes while maintaining security control through cryptographic means.
Solution Approach 2:
The key derivation process enables self-service by allowing parties to autonomously generate secure symmetric keys using the shared initial key and predetermined key derivation functions. This eliminates the need for key management teams to manually distribute keys via physical mailing, significantly reducing operational burden while maintaining security through automated cryptographic processes.
4Reliability
If continuous key distribution is performed to maintain secure communication, then security is maintained, but costs and operational complexity significantly increase
Solution Approach 1:
The system extracts the essential security element (the initial key) and separates it from the frequent key distribution process. By taking out the initial key establishment as a one-time event and using it to derive multiple symmetric keys, the system eliminates the need for continuous key distribution infrastructure and complex operational procedures, thereby reducing device and operational complexity while maintaining secure communication.
Data Source
AI summary
Systems, apparatuses, methods, and computer program products are disclosed for secure communication based on random key derivation. An example method includes receiving, by communications hardware of a first device, an initial key shared between the first device and a second device. The example method also includes receiving, by the communications hardware of the first device, a first set of seed bits, wherein the first set of seed bits is also received by the second device. The example method also includes deriving, by key derivation circuitry of the first device, a first symmetric key based on the initial key and the first set of seed bits. The example method also includes performing, by data protection circuitry of the first device, a first cryptographic data protection action using the first symmetric key.