Ephemeral Encryption Key Lifecycle for Predictable Cloud Key Destruction
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Solution Overview
Problem
Existing systems fail to provide reliable and predictable destruction of encryption keys, especially in cloud environments, where ephemeral keys are required for secure data management.
Innovation Solution
A logical treadmill of encryption keys is maintained with a predetermined schedule for creation, distribution, and destruction, using a distributed system with a read-only interface for cryptographic oracle access, ensuring keys are only in volatile memory and are erased upon expiration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional high-value master keys are used for data encryption, then data security is maintained through access control, but key ephemerality and guaranteed destruction cannot be achieved
Solution Approach 1:
The patent transforms the static, permanent nature of traditional master keys into a dynamic, ephemeral system. Keys are continuously created, distributed to clients, and automatically destroyed after a predetermined time period. This dynamic key lifecycle ensures that no single key persists indefinitely, providing both security through rotation and guaranteed destruction through automated expiration mechanisms.
Solution Approach 2:
The patent employs short-lived encryption keys that are automatically destroyed after use or after a predetermined time period. These ephemeral keys serve their purpose of encrypting data and then are reliably destroyed, eliminating the need for long-term key retention. This disposable key approach ensures that even if data copies remain in memory, the cryptographic keys themselves cannot be recovered after destruction.
2Ease of operation
If encryption keys are retained for long-term access, then data availability is improved, but the ability to guarantee key destruction and achieve ephemerality is lost
Solution Approach 1:
The patent implements periodic key rotation where encryption keys are systematically created, distributed, and destroyed in regular cycles. Each key has a predetermined lifespan after which it is automatically destroyed and replaced with a new key. This periodic action ensures data remains accessible during each key's valid period while systematically eliminating long-term key exposure risks through automated destruction.
Solution Approach 2:
The patent establishes predetermined destruction schedules for encryption keys before they are even used. Each key is created with an embedded expiration timestamp or lifecycle policy that automatically triggers its destruction after a specified time period. This preliminary action of pre-scheduling key destruction ensures that keys cannot be retained beyond their intended lifespan, proactively preventing key exposure risks before they can materialize.
3Reliability
If automated key management systems are implemented, then key destruction reliability is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service automated key management where the system autonomously creates, distributes, tracks, and destroys encryption keys without requiring manual intervention. The key lifecycle is automatically managed through predetermined schedules and expiration policies embedded in the system. This self-service approach ensures reliable key destruction while minimizing the operational complexity of manual key management tasks.
Solution Approach 2:
The patent employs feedback mechanisms where the key management system continuously monitors key usage, tracks elapsed time since key creation, and automatically triggers destruction when predetermined time thresholds are reached. This feedback loop ensures that keys are destroyed reliably at the correct time while the system adapts to maintain security policies. The automated feedback-based destruction reduces complexity compared to manual tracking by using system-generated timing and destruction triggers.
Data Source
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AI summary
The present disclosure provides for a logical treadmill of encryption keys which are created, distributed, and destroyed on a predictable schedule. It further provides for a read-only interface for a remote procedure call (RPC) infrastructure, the interface providing cryptographic oracle access to keys on the treadmill.