Secure Clipboard Token Verification for Data Transfer

The patent introduces a secure clipboard as an intermediary component between the source application and destination application. The secure clipboard stores encrypted data and requires authorization tokens for paste operations, acting as a mediator that enforces security policies while still enabling copy-paste functionality. This resolves the contradiction by maintaining productivity through continued use of copy-paste while adding security layers that prevent unauthorized data transfer.

The patent implements preliminary security measures by encrypting data before it is stored in the clipboard and by pre-establishing authorization rules for which applications can receive pasted data. The system performs security validation in advance of the actual paste operation, ensuring that only authorized applications can receive sensitive data. This preliminary action prevents data security breaches while maintaining efficient data transfer.

The patent uses cryptographic copying where the original data is encrypted and stored in the clipboard, and a separate token (copy of authorization information) is used to verify permission to paste. The actual data remains encrypted until the paste operation is authorized by matching the token with the encryption key. This copying approach allows security verification without requiring complex real-time analysis of the actual data content.

The patent extracts the security verification mechanism from the data itself by separating the encrypted data storage from the authorization verification. The token system extracts authorization information into a separate verification layer, allowing the clipboard to store data securely while using independent token validation for access control. This extraction reduces complexity by modularizing the security system.

The patent performs encryption of data in advance when it is copied to the clipboard, so that the encrypted data can be stored and transferred without real-time processing overhead. The decryption and verification operations are prepared in advance through token generation, allowing rapid paste operations once authorization is confirmed. This preliminary action moves computational overhead away from the critical paste path.

The patent uses cryptographic copying where the encrypted data is stored in the clipboard and a separate token is used for verification. The token contains pre-computed authorization information that can be quickly validated without decrypting the actual data during the paste operation. This copying strategy separates the heavy encryption/decryption operations from the fast token verification process.