Content Revocation List for Invalid Data Removal in CCN
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Solution Overview
Problem
In content-centric networks (CCN), there is a need for an efficient method to delete invalid content, such as obsolete or malicious data, to maintain network integrity and reduce network load, as existing methods lack a standardized approach for content revocation across nodes.
Innovation Solution
A communication method involving an administration node, a requesting node, and a normal node that utilizes a content revocation list, including the name of the invalid content and a deletion period, is implemented. The administration node generates and transmits this list after authenticating the requesting node, allowing the normal node to delete the content and maintain the list during the specified time, ensuring secure and efficient content removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If content is cached in intermediate nodes to reduce transmission route length, then network efficiency is improved, but invalid or malicious content may propagate throughout the network
Solution Approach 1:
The content revocation list is generated and distributed to intermediate nodes before invalid content can be widely propagated. By preemptively providing deletion instructions with content names and time periods, the system prevents malicious or obsolete content from being cached and distributed further, thus maintaining network efficiency while blocking harmful content propagation
Solution Approach 2:
The system implements a feedback mechanism where the administration node receives information about invalid content, generates appropriate revocation lists, and distributes them back to intermediate nodes. This closed-loop feedback enables dynamic adjustment of cached content based on network conditions and security requirements, allowing efficient content delivery while preventing the spread of invalid content
2Reliability
If a centralized content revocation system is implemented to delete invalid content, then network integrity is improved, but system complexity increases due to authentication and list management
Solution Approach 1:
The content revocation list serves as an intermediary mechanism between the administration node and intermediate nodes. Instead of direct complex authentication and control interactions, the system uses standardized revocation lists that contain content names, time periods, and deletion instructions. This intermediary simplifies the interaction protocol while maintaining strong security through digital signatures, thus improving network integrity without excessively increasing system complexity
Solution Approach 2:
The content revocation list structure is designed to be universal and multi-functional, handling various types of invalid content (malicious, obsolete, updated) through a single standardized format. The list can be applied across different intermediate nodes and content types using the same deletion logic, reducing the need for node-specific complexity while maintaining comprehensive network integrity control
Data Source
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AI summary
Provided is a communication method for an administration node in a content centric network (CCN). The communication method includes receiving a packet requesting deletion of an invalid content from a requesting node that detects the invalid content, generating a content revocation list including a name of the invalid content and a period of time over which the deletion is to be performed, and flooding a data packet including the content revocation list to the requesting node and a normal node included in the CCN. Also provided are related communications methods for a receiving node and a normal node, as well as the nodes themselves.