Mail Security Device Decrypting Email Packets
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Solution Overview
Problem
Current security systems are unable to effectively detect and block malicious attempts to access mail servers using communication protocols for mail engines, as they lack the capability to decrypt and inspect the detailed contents of email packets.
Innovation Solution
A mail security processing device and operation method that configures a security network to inspect and block malicious mail server access attempts by using a communication protocol processing module for mail engines, allowing for the decryption and analysis of email packet contents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a firewall or general security inspection system is used to protect mail servers, then basic packet threats can be detected and filtered, but detailed contents of encrypted mail engine protocol packets cannot be confirmed
Solution Approach 1:
The patent introduces a mail engine module as an intermediary component between the security inspection system and encrypted mail traffic. This module acts as a mediator that can decrypt and decode mail engine protocol packets (SMTP, POP3, IMAP, MAPI) while allowing normal mail traffic to pass through, enabling the security system to inspect detailed packet contents without disrupting mail server operations
Solution Approach 2:
The security system is segmented into multiple functional modules: a mail engine module that handles protocol-specific decryption and decoding, and a security inspection module that analyzes the decoded contents. This segmentation allows each module to specialize in its function, with the mail engine module focusing on protocol understanding and the security module focusing on threat detection
2Ease of operation
If mail server access is left open for legitimate email communication, then normal email services can function, but the server becomes vulnerable to hacking, phishing, and account takeover attacks
Solution Approach 1:
The security inspection occurs preliminarily before mail packets reach the mail server. The system preemptively detects and blocks malicious access attempts to account takeover, phishing, and hacking attacks before they can compromise the server, while allowing legitimate email communication to proceed without interruption
Solution Approach 2:
The system implements feedback mechanisms where inspection results from the mail engine module are fed back to the security inspection module in real-time. This feedback loop enables dynamic adjustment of security measures, allowing the system to learn from detected patterns and improve its ability to distinguish between legitimate and malicious traffic
Data Source
AI summary
According to an embodiment of the present invention, there is provided an operation method of a mail security device that configures a security network of a mail access security system and includes a security threat inspection unit for performing a security threat inspection corresponding to an inbound mail, and a mail processing unit for transferring the mail for which the security threat inspection has been completed to a mail server in the security network.