Email Cluster Encryption via DNS Key Discovery
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Solution Overview
Problem
Existing email delivery systems face challenges in securely transmitting emails across different enterprise domains without relying on prior sharing of encryption keys or protocol configurations, leading to inefficiencies and additional user steps.
Innovation Solution
A method and system that utilize mail transport agents (MTAs) to seamlessly encrypt and decrypt emails by querying domain name services (DNS) and key services, determining encryption configurations, and caching keys, eliminating the need for prior key sharing or protocol configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If prior key sharing or protocol configuration is implemented to ensure secure email transmission, then security is improved, but system complexity and operational overhead increase
Solution Approach 1:
The system enables email clients to automatically obtain encryption keys through DNS queries without requiring manual key exchange or protocol configuration. The DNS infrastructure itself provides the key distribution service, making the system self-configuring and eliminating complex setup procedures while maintaining security
Solution Approach 2:
The patent introduces DNS as an intermediary service that mediates key distribution between email clients and key services. Instead of direct peer-to-peer key sharing, the DNS system acts as a trusted mediator that resolves domain names to key service endpoints, simplifying the overall system architecture
2Reliability
If manual key exchange procedures are required for secure email communication, then encryption security is maintained, but ease of operation deteriorates
Solution Approach 1:
Email clients automatically perform DNS queries to obtain encryption keys without user intervention. The entire key acquisition process is automated through the DNS resolution mechanism, making secure email communication as easy to use as sending a regular email while maintaining strong encryption
Solution Approach 2:
The system performs key acquisition in advance by querying DNS before email transmission. The DNS resolution and key service communication happen automatically as a preliminary step, so when the user sends an email, the encryption is already configured and ready to go
3Reliability
If pre-negotiation of encryption protocols is implemented between email systems, then security is improved, but productivity deteriorates due to additional setup steps
Solution Approach 1:
The DNS infrastructure is pre-configured with key service endpoint information in DNS records. This preliminary setup eliminates the need for runtime protocol negotiation, as the key service locations are already resolved and cached in the DNS system, enabling immediate encryption without setup delays
Solution Approach 2:
The DNS system serves multiple functions: it resolves domain names to IP addresses and simultaneously provides key service endpoint discovery. This multi-functionality eliminates the need for separate key distribution infrastructure, streamlining the email delivery process while maintaining security
Data Source
AI summary
The systems and methods described provide a seamless end-to-end email delivery between secure email clusters without reliance on prior sharing of encryption keys or protocol configurations. The solution can receive a request to transmit an email to a recipient identified by a domain of the recipient. The solution can transmit a first query to a domain name service (DNS) to fetch one or more records corresponding to the domain of the recipient. The one or more records can identify a key service. The solution can receive, from the key service responsive to a second query to the key service, a key for encrypting the email. The solution can encrypt at least a portion of the email based at least on the key and transmit the encrypted email to the recipient.