State Token Security for Single Page Applications
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Solution Overview
Problem
Single page applications (SPAs) are vulnerable to data mining and unauthorized access due to client-side API call construction and lack of effective rate limits, allowing malicious users to exploit APIs for unauthorized data retrieval and manipulation.
Innovation Solution
A Finite State Machine (FSM) based security scheme is implemented, where tokens are generated and verified by the API server to ensure that users navigate through states in a specific order, preventing orchestrated calls by malicious users and making data mining attacks more expensive or time-consuming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If client-side API call construction is used in SPAs, then application responsiveness and loading speed are improved, but security is worsened because API methodologies become visible to malicious users
Solution Approach 1:
The patent introduces a state token as an intermediary between the client and API server. The state token encodes the application state and validates API requests without exposing the actual API construction methodology. This mediator allows fast client-side rendering while preventing malicious users from exploiting visible API structures, as the state token validates requests based on encoded state rather than exposed API methodologies.
2Object-affected harmful factors
If rate limits are imposed on API calls, then data mining attacks are slowed down, but legitimate user productivity is reduced due to unnecessary call restrictions
Solution Approach 1:
The patent changes the validation parameter from simple rate limiting to state token verification. Instead of counting and limiting API calls, the system validates whether each request corresponds to a legitimate state transition encoded in the state token. This allows legitimate users to make unlimited API calls as needed while automatically preventing data mining attacks, as malicious requests cannot produce valid state tokens and will be rejected regardless of call frequency.
3Reliability
If traditional server-side security is used, then API protection is improved, but application responsiveness is worsened due to continuous server validation requirements
Solution Approach 1:
The patent performs security validation in advance by encoding the application state and valid transition paths into the state token before API calls are made. The state token pre-contains the authorization information needed for subsequent API requests. This eliminates the need for continuous server-side validation during API calls, as the client can validate requests locally using the pre-encoded state token, thereby maintaining both security and responsiveness.
Data Source
AI summary
Techniques for securing a single page application (SPA) are provided. An API server that receives an API call from an SPA to navigate a first user to a first state of the SPA navigates the first user to the first state of the SPA and generates a first token indicating that the first user has accessed the first state of the SPA. When the API server receives a request from the first user to navigate to a second state of the SPA (the request including the first token), the API server verifies that the first token indicating that the first user has accessed the first state of the SPA is valid for the second state of the SPA before navigating the first user to the second state of the SPA. Additionally, the API server expires the first token upon navigating the first user to the second state of the SPA.