Token-Based Anonymous Authentication in Social Networks
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Solution Overview
Problem
In Pervasive Social Networking (PSN), existing authentication mechanisms face challenges in efficiently authenticating nodes while preserving privacy and managing trust, as frequent changes in pseudonyms lead to increased computation costs and scalability issues, particularly in decentralized networks like MANETs.
Innovation Solution
A method involving a network entity that issues tokens with validity periods and backup tokens to nodes, allowing for anonymous authentication and trust management, with the ability to update tokens and manage trust levels, ensuring secure and efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent pseudonym changes are implemented for privacy preservation in PSN, then anonymity is improved, but computation cost and system complexity increase
Solution Approach 1:
The authentication credential is segmented into multiple tokens with different validity periods (short-term and long-term tokens). This segmentation allows nodes to use short-term tokens for frequent authentication operations without repeatedly changing pseudonyms, thereby maintaining anonymity while reducing computation cost associated with frequent credential updates.
Solution Approach 2:
Long-term tokens are pre-issued to nodes along with short-term tokens. These long-term tokens serve as backup credentials that can be used when short-term tokens expire or when nodes need to re-authenticate without going through the complete pseudonym change process, thus reducing computation overhead while preserving anonymity.
2Reliability
If traditional authentication mechanisms are used in decentralized networks, then security is improved, but scalability deteriorates
Solution Approach 1:
The token-based authentication system enables nodes to perform self-service authentication using their own tokens and the distributed token list. Nodes can verify each other's credentials without requiring centralized authentication servers for every authentication operation, thereby maintaining security through cryptographic verification while improving scalability by reducing dependency on central authorities.
Solution Approach 2:
The token list distributed across the network acts as an intermediary credential repository. Instead of direct peer-to-peer authentication or centralized server mediation, nodes use the shared token list to verify credentials, providing a scalable intermediary mechanism that maintains security without single-point bottlenecks.
3Reliability
If tokens with validity periods are implemented, then trust management is improved, but system complexity increases
Solution Approach 1:
The system implements dynamic token validity periods where tokens automatically expire after predetermined time intervals. This dynamic mechanism provides temporal trust management - short-term tokens for immediate authentication needs and long-term tokens for extended periods. The automatic expiration and renewal process manages trust without requiring complex manual intervention, balancing trust management capability with system simplicity.
Data Source
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AI summary
A method for anonymous authentication may comprise: issuing token information to a first node registered with a network entity, wherein the token information indicates one or more tokens for the first node; distributing a token list to a plurality of nodes registered with the network entity, wherein the token list is associated with respective tokens for the plurality of nodes comprising at least the first node and a second node, and wherein the token information and the token list are used for an anonymous authentication between the first node and the second node.