Certificate Verification via Dual-Interface Comparison
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Solution Overview
Problem
Eavesdropping on electronic communications remains a risk due to the difficulty in establishing and maintaining secure protocol connections, particularly in the presence of man-in-the-middle attacks where forged certificates can undermine the confidentiality of information exchanged over unsecured networks.
Innovation Solution
A system that uses a second interface to obtain a cryptographic certificate via a different path, allowing for the detection of man-in-the-middle attacks by comparing the certificate received over the primary interface with a copy received over the secondary interface, thereby preventing the establishment of a compromised secured protocol connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If symmetric encryption keys are exchanged beforehand out of band, then confidentiality of information is preserved, but the complexity of key exchange increases and requires multiple communication channels
Solution Approach 1:
The patent extracts the certificate verification process from the main communication channel and performs it separately through a second interface. This allows the primary communication to proceed while certificate validation occurs in parallel through an alternative path, resolving the contradiction by separating the verification function from the main data exchange channel.
Solution Approach 2:
The patent obtains a copy of the certificate in advance through a second interface before the actual communication takes place. This preliminary verification action allows the system to validate certificates beforehand, ensuring confidentiality is established before sensitive information exchange begins.
2Ease of operation
If public key encryption is used to communicate over unsecured networks, then ease of key exchange is improved, but vulnerability to man-in-the-middle attacks increases
Solution Approach 1:
The patent introduces a second interface as an intermediary verification path. This intermediary channel provides an additional layer of validation that mediates between the public key exchange and the final trust establishment, helping to detect and prevent man-in-the-middle attacks while maintaining the ease of public key exchange.
Solution Approach 2:
The patent implements a feedback mechanism where the certificate obtained through the second interface is compared with the certificate from the first interface. This feedback loop validates whether the public key exchange was compromised, allowing the system to detect man-in-the-middle attacks and reject fraudulent connections.
3Difficulty of detecting and measuring
If a second interface is used to verify certificates, then detection of man-in-the-middle attacks is improved, but device complexity and resource consumption increase
Solution Approach 1:
The patent makes the second interface serve multiple functions: it is used both for obtaining certificate copies and for comparing them to detect attacks. This multi-functionality reduces the need for separate dedicated verification hardware, thereby limiting the increase in device complexity while maintaining enhanced detection capabilities.
Data Source
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AI summary
According to an example aspect, there is provided an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to participate in establishment of a secured protocol connection, receive over a first interface a certificate in connection with the establishment of the secured protocol connection, receive, in connection with the establishment of the secured protocol connection, over a second interface, information concerning the certificate, and compare the certificate to the information concerning the certificate