Out-of-Band User Device Authentication Against In-Band Spoofing
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Solution Overview
Problem
In-band components of computing devices can be compromised by malicious parties, leading to spoofed authentication processes and unauthorized access to sensitive data, compromising the security of computer-implemented services.
Innovation Solution
Implementing a two-factor authentication process that includes a first factor using in-band components and a second factor using out-of-band components, such as a management controller and a trusted out-of-band server, to authenticate user devices independently of potentially compromised in-band hardware resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-band components are used for authentication, then the authentication process is simple and integrated, but the security is compromised due to potential malicious compromise of in-band components
Solution Approach 1:
The authentication system is segmented into two independent parts: in-band authentication components and out-of-band authentication components. The out-of-band server and management controller form a separate authentication path that operates independently from the potentially compromised in-band components, allowing security verification through multiple independent channels
Solution Approach 2:
An out-of-band server acts as an intermediary between the user device and the application device. This intermediary establishes a separate communication channel that bypasses the compromised in-band components, enabling trusted authentication by mediating the verification process through an independent third-party server
2Reliability
If out-of-band authentication is implemented, then the security and trustworthiness of authentication is enhanced, but the device complexity and authentication process overhead increase
Solution Approach 1:
The critical security verification function is extracted from the potentially compromised in-band components and placed into out-of-band components. The management controller and out-of-band server form a separate authentication subsystem that is taken out from the main system architecture, isolating the security-critical operations from the attack surface of in-band components
Data Source
AI summary
Methods and systems for authenticating a user device to an application device are disclosed. The user device may request access to a (computer-implemented) service provided by the application device. Access to the service may include access to sensitive data; therefore, to prevent unauthorized access to the sensitive data, the user device may be authenticated to the application device before the service is provided. To do so, the application device may perform a first factor authentication using in-band hardware resources of the user device; however, the in-band hardware resources may be vulnerable to attacks by malicious parties. Thus, in addition, a second factor authentication of the user device may be performed out-of-band (e.g., using a management controller of the user device) in order to bypass potentially compromised in-band hardware resources. The additional out-of-band authentication may reduce the likelihood of the malicious parties gaining access to the sensitive data via spoofing attacks.