Webmail Encryption with Automated Backend Key Management
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Solution Overview
Problem
Existing encryption solutions for webmail services are not user-friendly, requiring manual management of cryptographic keys and are not widely adopted due to complexity, making it difficult for users to encrypt and decrypt messages effectively.
Innovation Solution
A messaging system that includes a backend service for managing public and private key pairs, allowing users to encrypt messages using a symmetric key and inserting the encrypted content and key into emails via a webmail service, with user interface elements for easy encryption and decryption within a webmail application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual key exchange and cryptographic key management are implemented, then encryption security is improved, but ease of operation deteriorates
Solution Approach 1:
The patent introduces an automated key management system that acts as an intermediary between users and the encryption process. The system automatically generates, distributes, and manages cryptographic keys without requiring manual key exchange. Users simply compose emails with a single click, and the system handles the complex key management tasks in the background, maintaining security while dramatically improving ease of operation.
Solution Approach 2:
The key management system operates autonomously, generating and distributing keys without human intervention. The system self-manages the cryptographic infrastructure, automatically pairing keys with user accounts and handling key rotation and expiration. This eliminates the need for users to manually manage keys while maintaining strong encryption security.
2Reliability
If complex encryption procedures are implemented, then security is improved, but device complexity increases
Solution Approach 1:
The patent extracts the complex encryption and key management logic from the user interface and places it in a backend key management system. The webmail interface remains simple and familiar to users, while the complex cryptographic operations are performed separately by the automated key management infrastructure. This separation maintains high security while keeping the user-facing system simple.
3Ease of operation
If automated key management is implemented, then ease of operation is improved, but loss of information increases
Solution Approach 1:
The key management system provides users with feedback and control over their encryption keys. Users can view their key pairs, regenerate keys if needed, and manage key expiration settings. The system maintains transparency about key status and provides audit trails, ensuring users retain control and awareness of their cryptographic materials while benefiting from automated management.
Data Source
AI summary
Encryption of message content of an e-mail sent by way of a webmail service may be performed in response to activation of a user interface element. The message content may be encrypted using a symmetric key. A public key of a recipient of the e-mail is received from a backend service and employed to encrypt the symmetric key. The encrypted symmetric key and encrypted message content are sent to a recipient by way of the webmail service. Decryption of the encrypted message content may be performed in response to activation of another user interface element. A private key of the recipient is received from the backend service and employed to decrypt the encrypted symmetric key. The symmetric key is thereafter employed to decrypt the encrypted message content.