Dynamic Session Encryption for 5G Forward Secrecy
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Solution Overview
Problem
Existing 5G wireless communication systems lack forward secrecy, making them vulnerable to replay attacks and compromising user data security, and are not quantum-resistant, posing a threat from emerging quantum computing technologies.
Innovation Solution
Implement dynamic data encryption methods using shared secret keys generated per session, employing both secure and insecure channels, and incorporating post-quantum cryptography to ensure perfect forward secrecy and protect against quantum attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional encryption methods are used in 5G systems, then current security requirements are met, but the system becomes vulnerable to quantum attacks and lacks forward secrecy
Solution Approach 1:
The patent implements dynamic key generation where ephemeral key pairs are created for each communication session rather than using static keys. This dynamic approach ensures that even if long-term private keys are compromised, past session keys remain secure (forward secrecy), and the system becomes adaptable to quantum threats by using post-quantum cryptographic algorithms that can be updated without changing the fundamental architecture
Solution Approach 2:
The encryption system is segmented into multiple layers: information theoretic encryption for confidentiality, post-quantum key encapsulation for key exchange, and authentication mechanisms. This segmentation allows each layer to address specific security requirements independently, enabling the system to achieve both current security standards and quantum resistance simultaneously
2Reliability
If dynamic key generation is implemented for forward secrecy, then security against replay attacks is improved, but computational complexity increases
Solution Approach 1:
The patent performs preliminary key generation and encapsulation operations during the initial connection establishment phase. By pre-generating ephemeral key pairs and performing key encapsulation before actual data transmission, the system ensures forward secrecy is established in advance, while spreading the computational load across different phases of communication rather than during critical data processing
3Adaptability or versatility
If post-quantum cryptography is adopted, then quantum resistance is achieved, but encryption overhead and processing time increase
Solution Approach 1:
The post-quantum key encapsulation mechanism serves multiple functions simultaneously: it provides secure key exchange resistant to quantum attacks, establishes forward secrecy through ephemeral key generation, and enables authentication. This multi-functionality reduces overall system overhead by consolidating multiple security operations into a single cryptographic primitive that handles key exchange, encryption, and authentication in an integrated manner
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal for dynamic data encryption in a communication system is provided. The method includes receiving, from a network entity, a list of network public keys including a plurality of network public keys and corresponding key indexes, generating a pair of keys including a user equipment (UE) public key and a UE private key in response to receiving the list of network public keys, randomly selecting a network public key from the list of network public keys received from the network entity, generating a shared secret key corresponding to the UE by using the randomly selected network public key and the UE private key, and encrypting data to be transferred between the UE and the network entity by using the generated shared secret key corresponding to the UE.