Encrypted Traffic Analysis for DoS Detection Without Decryption
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Solution Overview
Problem
Current security solutions are ineffective in detecting and mitigating encrypted Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) attacks, particularly in secured datacenters that process only inbound traffic, as they require decryption of both ingress and egress traffic and are not adapted to handle encrypted protocols like TLS and SSL.
Innovation Solution
A method and system that establish an encrypted connection with a client device using cryptographic protocols, analyze inbound traffic to detect encrypted attacks, and establish a new encrypted connection without decrypting the traffic, allowing for the mitigation of encrypted DoS/DDoS attacks by processing only inbound traffic in secured datacenters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional decryption techniques are used to detect encrypted attacks, then attack detection capability is improved, but device complexity and processing overhead increase significantly
Solution Approach 1:
The patent extracts only the necessary cryptographic parameters (ciphertext, initialization vectors, authentication tags) from the encrypted traffic for analysis, rather than decrypting the entire traffic stream. This selective extraction enables attack detection while avoiding the computational burden of full decryption.
Solution Approach 2:
Instead of decrypting the traffic to detect attacks, the patent inverts the approach by analyzing the encrypted traffic directly using cryptographic verification methods. The system validates the cryptographic integrity of packets without revealing the underlying plaintext, thus detecting attacks in the encrypted domain.
2Reliability
If both ingress and egress traffic are processed for decryption, then complete attack detection is achieved, but loss of time and processing efficiency worsen
Solution Approach 1:
The patent segments the attack detection function into two parts: (1) analysis of ingress traffic for incoming attacks, and (2) analysis of egress traffic for outgoing attacks. The system can selectively apply decryption or cryptographic verification to each direction based on the specific threat model, reducing overall processing time while maintaining detection completeness.
Solution Approach 2:
The patent applies partial decryption or cryptographic verification only to the extent necessary for attack detection. Rather than fully decrypting all packets, the system performs minimal cryptographic operations (such as verifying authentication tags or checking ciphertext patterns) to detect attacks, thus reducing processing time while maintaining detection effectiveness.
3Reliability
If cryptographic protocols are used for secure communication, then security is improved, but vulnerability to encrypted DoS/DDoS attacks increases
Solution Approach 1:
The patent implements feedback mechanisms that monitor the cryptographic processing load and traffic patterns in real-time. When signs of encrypted DoS/DDoS attacks are detected (such as abnormal rates of cryptographic operations or packet patterns), the system dynamically adjusts its response by blocking suspicious connections or rate-limiting traffic, thus mitigating the vulnerability while maintaining secure communication.
Solution Approach 2:
The patent applies preliminary anti-action by pre-configuring detection rules and cryptographic verification mechanisms that proactively identify and block encrypted DoS/DDoS attacks before they can overwhelm the system. The system prepares cryptographic validation routines and attack detection algorithms in advance, enabling rapid response to encrypted threats without compromising the security of legitimate cryptographic communication.
Data Source
AI summary
A method and system for detecting attacks performed using a cryptographic protocol are presented. The method includes upon receiving an indication about a potential attack, establishing an encrypted connection with a client device using the cryptographic protocol; receiving an inbound traffic from the client device, wherein the inbound traffic is originally directed to a protected entity; analyzing the inbound traffic received on the encrypted connection to detect at least one encrypted attack; and causing to establish a new encrypted connection between the client device and the protected entity, when the at least one encrypted attack at the application layer has not been detected.