Group Key Update Cycle Optimization for Multicast Security
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Solution Overview
Problem
Existing systems for updating keys in secure multicast services face challenges in balancing communication costs and security damage costs, as they often require determining an optimal key update cycle that minimizes overall costs while ensuring secure group communication.
Innovation Solution
A system and method that determine a key update cycle based on a tradeoff between communication cost and security damage cost, using a key update cycle determining unit to calculate and manage the cycle through communication and security damage cost calculations, incorporating weight values to optimize the update process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key update cycle is shortened to improve security, then security damage cost decreases, but communication cost increases
Solution Approach 1:
The system dynamically changes the key update cycle parameter based on service characteristics and security requirements. Different services are assigned different key update cycles (e.g., short cycle for high-security services, long cycle for low-security services), optimizing the balance between security and communication cost for each service type.
Solution Approach 2:
The key update cycle is made dynamic rather than fixed. The system adjusts the update cycle in real-time based on service characteristics, security damage costs, and communication costs, allowing the security parameters to adapt to changing conditions and service requirements.
2Loss of energy
If key update cycle is lengthened to reduce communication cost, then communication cost decreases, but security damage cost increases
Solution Approach 1:
The system changes the key update cycle parameter based on service characteristics. For services with low security requirements or abundant communication resources, a longer key update cycle is assigned, reducing communication overhead while maintaining acceptable security levels.
Solution Approach 2:
The system dynamically adjusts the key update cycle length based on the tradeoff between communication cost and security damage cost. The key updating unit modifies update frequencies according to service characteristics, allowing longer cycles for non-critical services and shorter cycles for critical services.
3Reliability
If frequent key updates are performed to minimize security risk, then security improves, but communication resource consumption increases
Solution Approach 1:
Different key update strategies are applied to different services based on their local characteristics. High-security services receive frequent key updates with short cycles, while low-security services receive less frequent updates with long cycles, optimizing resource allocation for each service's specific needs.
Solution Approach 2:
The system changes the key update cycle parameter according to service characteristics. Services are categorized into different security levels, and each category is assigned an appropriate key update cycle, avoiding unnecessary frequent updates for low-security services and ensuring adequate updates for high-security services.
Data Source
AI summary
A system and method of updating a key based on communication and security damage costs are provided. The key updating system for group communication between a plurality of group members, includes a key update cycle determining unit to determine a key update cycle based on a communication cost and a security damage cost, and a key updating unit to perform a key updating with respect to one or more group members of the group communication based on the determined key update cycle.