Handshake-Free Encrypted Communication via Symmetric Key Caching
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Solution Overview
Problem
Existing encrypted communication protocols, such as HTTPS, require a handshake process that introduces delays, particularly in mobile networks with long round-trip times, which degrades user experience by necessitating additional messages for establishing a secure channel.
Innovation Solution
Implementing handshake-free encrypted communication using symmetric key caching, where an ongoing communication relationship between devices maintains a changing cached symmetric encryption key, eliminating the need for the handshake process by leveraging an existing shared secret.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a handshake process is used to establish encrypted communication, then security is ensured through key exchange, but communication delay increases due to additional messages required
Solution Approach 1:
The patent applies preliminary action by establishing and caching symmetric encryption keys during an initial handshake process, so that subsequent communications can proceed without repeated key exchange. The cached keys are reused for multiple communication sessions, eliminating the need for time-consuming handshake processes in ongoing communications between the same devices.
2Speed
If symmetric key caching is implemented for handshake-free communication, then communication speed improves by eliminating handshake overhead, but key management complexity increases
Solution Approach 1:
The patent implements self-service through automatic key caching and retrieval mechanisms. The system automatically caches symmetric keys during initial handshakes, retrieves appropriate cached keys for subsequent communications, and manages key validity periods without requiring manual intervention. This automation reduces the perceived complexity for users while maintaining secure key management.
3Productivity
If cached symmetric keys are reused for multiple communications, then overhead is reduced and efficiency improves, but security risk increases if keys are compromised
Solution Approach 1:
The patent applies dynamics by implementing time-based key validity periods and automatic key rotation. Cached symmetric keys are assigned expiration times after which they can no longer be used, ensuring that even if a key is compromised, the window for potential security breaches is limited. The system dynamically manages key lifecycle including creation, caching, expiration, and rotation based on communication patterns and security requirements.
Data Source
AI summary
Techniques for handshake-free encrypted communication are described. An apparatus may comprise a key component, a message component, and a network component. The key component may be operative to retrieve a first symmetric encryption key from a key store and to store a second symmetric encryption key in the key store. The message component may be operative to construct a message comprising a data section, the data section encrypted using the first symmetric encryption key. The network component may be operative to transmit the message to a device and to receive a response to the message, the response comprising the second symmetric encryption key. Other embodiments are described and claimed.