Secure Time Service Using Integrated Cryptographic Boundary
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Solution Overview
Problem
Existing security mechanisms for network-accessible applications rely on tamper-proof time sources, but traditional solutions are expensive and complex, requiring multiple high-end hardware security appliances and posing challenges in securing timestamp communications across distributed environments.
Innovation Solution
A network-accessible secure time service system is implemented using high-precision time sources like atomic clocks, cryptographic engines, and cryptographic keys, with time servers and endpoints configured within a cryptographic boundary, providing secure timestamp generation and management through a provider network with distributed time servers and customizable endpoints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional high-end hardware security appliances are used for tamper-proof time sources, then security reliability is improved, but cost and device complexity increase significantly
Solution Approach 1:
The patent combines multiple security functions (time source, cryptographic engine, hardware security module) into a single integrated appliance. The time server integrates HSMs, cryptographic engines, and atomic clocks in one device, eliminating the need for separate security appliances and reducing overall system complexity while maintaining high security reliability.
Solution Approach 2:
The integrated time server appliance performs multiple functions: providing accurate time sources, generating cryptographic keys, performing cryptographic operations, and securing communications. This multi-functional design replaces multiple specialized devices, reducing complexity while maintaining security reliability.
2Reliability
If multiple expensive security appliances are deployed for continuity and disaster recovery, then reliability is improved, but cost increases
Solution Approach 1:
The system segments security functions into modular components within the integrated appliance, allowing independent deployment and configuration. This enables customers to deploy only the necessary security functions and reduces the need for multiple full-size appliances, lowering cost while maintaining reliability through selective redundancy.
Solution Approach 2:
The patent enables virtualization of time server functions, allowing customers to create virtual copies of the time server appliance. This provides disaster recovery capabilities without requiring physical duplication of expensive hardware, reducing cost while maintaining continuity of operations through virtual instances.
3Reliability
If traditional security appliances are used, then timestamp security is improved, but the complexity of securing communications across distributed environments increases
Solution Approach 1:
The integrated time server acts as a centralized intermediary that provides secure timestamp generation and distribution to multiple distributed servers. It handles cryptographic key management and secure communications centrally, simplifying the communication security architecture while maintaining timestamp security across distributed environments.
Solution Approach 2:
The system changes the operational parameters of security by providing time-synchronized cryptographic operations across distributed systems. By coordinating cryptographic key generation and timestamping operations around a common secure time reference, the system simplifies communication security while maintaining security integrity.
Data Source
AI summary
Methods and apparatus for a secure time service are disclosed. A time server including a time source, a cryptographic key and a cryptographic engine is instantiated within a provider network. A time service endpoint receives a timestamp request from a client. The endpoint transmits a representation of the request to the time server, and receives, from the time server, an encryption of at least a timestamp generated using the time source. A response comprising the encryption of at least the timestamp is transmitted to the requesting client.