Email Encryption Routing for Incompatible Recipient Mail Clients
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Solution Overview
Problem
Existing email communication systems struggle to ensure secure end-to-end encryption when the recipient's mail client does not support the required encryption protocol, leading to potential data breaches and non-compliance with regulatory requirements.
Innovation Solution
A security server functions as a message transfer agent (MTA) that verifies encryption protocols, adjusts encryption levels, and provides secure web portals to ensure emails are encrypted to a minimum level or provides notification links, ensuring end-to-end encryption and compliance with regulatory standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strong encryption protocols are used to ensure email security, then security level is improved, but compatibility with recipient mail clients deteriorates
Solution Approach 1:
The patent introduces a security server as an intermediary between the email sender and recipient. This server acts as a mediator that performs encryption protocol verification and adaptation, allowing strong encryption to be used while maintaining compatibility with various mail clients through the intermediary's protocol conversion capabilities
Solution Approach 2:
The encryption protocol selection is made dynamic rather than static. The security server dynamically adjusts the encryption protocol based on real-time verification of recipient mail client capabilities, allowing the system to adapt between strong encryption when compatible and alternative protocols when needed, thus resolving the contradiction between security and compatibility
2Reliability
If encryption protocol verification is performed for all recipients, then security compliance is improved, but system complexity increases
Solution Approach 1:
The security server performs encryption protocol verification in advance before email transmission. This preliminary action ensures compliance with regulatory requirements by pre-checking recipient capabilities and determining appropriate encryption protocols, avoiding the need for complex runtime verification mechanisms
Solution Approach 2:
The system implements feedback mechanisms where the security server receives information about recipient mail client capabilities and uses this feedback to determine appropriate encryption protocols. This feedback loop automates the compliance verification process, reducing manual complexity while maintaining security standards
3Reliability
If encryption is enforced for all emails, then security level is improved, but ease of operation deteriorates
Solution Approach 1:
The patent applies different encryption quality levels locally based on recipient capabilities. Instead of uniformly applying strong encryption to all emails, the security server assesses each recipient's mail client capabilities and applies appropriate encryption levels - strong encryption where compatible and alternative methods where not compatible, thus maintaining data protection while ensuring accessibility
Data Source
AI summary
One variation of a method for end-to-end encryption of electronic mail includes: receiving an email encrypted according to a first encryption protocol and designating a recipient within an external domain; verifying encryption protocol supported by the recipient's mail client; in response to a recipient exclusion database identifying the recipient, encrypting the email to a less-robust encryption protocol supported by the recipient mail client and transmitting the email to the recipient; in response to the recipient exclusion database excluding the recipient and the recipient mail client supporting the first encryption protocol, transmitting the email encrypted according to the first encryption protocol to the recipient; and, in response to the recipient exclusion database excluding the recipient and the recipient mail client not supporting the first encryption protocol, generating a notification email including a hyperlink to a secure webpage containing content of the email and transmitting the notification email to the recipient.