Augmented Reality Document Decryption with Time-Window Access
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Solution Overview
Problem
Confidential documents, once decrypted and printed, lack assurance that they will not be accessed by unauthorized personnel, as there is no guarantee of maintaining privacy beyond the initial decryption.
Innovation Solution
The method employs augmented reality encryption and decryption, where an augmented reality device captures and decrypts a portion of an encrypted document using a temporary decryption key obtained from a communication network, ensuring only authorized individuals can access the decrypted content, while the document remains encrypted on the original device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a document is decrypted and printed for access, then the usability and accessibility of the document is improved, but the security and confidentiality of the document deteriorates as there is no guarantee it will not be accessed by unauthorized personnel
Solution Approach 1:
The patent implements dynamic encryption where the decryption state of the document changes over time. The document transitions from an encrypted state to a decrypted state only for authorized users within a specific time window, and then automatically re-encrypts. This dynamic state management resolves the contradiction by allowing temporary accessibility while maintaining overall confidentiality through automatic re-encryption after the time window expires.
Solution Approach 2:
The patent applies preliminary encryption to the document before it is made accessible. The document is pre-encoded with encryption algorithms and time-window parameters, so that even when decrypted, the content remains protected by the time-based access control mechanism. This preliminary protective measure ensures that accessibility does not permanently compromise confidentiality.
2Reliability
If a document is kept in encrypted form, then the security and confidentiality of the document is improved, but the usability and accessibility of the document deteriorates as it cannot be accessed without decryption
Solution Approach 1:
The system dynamically switches between encrypted and decrypted states based on time windows and user authorization. During authorized time windows, the document becomes accessible; outside these windows, it remains encrypted. This dynamic behavior resolves the contradiction by making the document accessible only when security conditions are met, rather than being permanently locked or permanently exposed.
Solution Approach 2:
The patent introduces a time-window mechanism as an intermediary between the encrypted document and the user. This intermediary controls access by allowing decryption only within specific time periods and for authorized users, thus mediating between the need for security (encrypted state) and the need for accessibility (decrypted state).
3Reliability
If a temporary decryption key is used with authentication, then the confidentiality of the document is maintained, but the complexity of the decryption process increases
Solution Approach 1:
The patent segments the decryption process into distinct components: authentication verification, time-window validation, and key generation. Each component handles a specific aspect of the decryption process, making the overall complex system manageable through modular organization. This segmentation allows the system to implement multiple security checks without creating a monolithic complex process.
Data Source
AI summary
A method, non-transitory computer readable medium and apparatus for decrypting a document are disclosed. For example, the method captures a tag on an encrypted document, transmits the tag to an application server of a communication network to request a per-document decryption key, receives the per-document decryption key if the tag is authenticated, and decrypts a portion of the encrypted document using a temporary decryption key contained in the tag, the tag decrypted with the per-document decryption key.