BIOS Credential Management for ATM Security
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Solution Overview
Problem
Automated Teller Machines (ATMs) face security breaches due to unauthorized access to the Basic Input/Output System (BIOS), and managing BIOS passwords for field engineers is challenging, as they need access for diagnostic purposes while posing a security risk if compromised.
Innovation Solution
A method for BIOS credential management involves creating entries in a data store for credentials, communicating them to service engineers, and automatically generating and updating unique, random passwords for each ATM, ensuring secure access and minimizing human intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BIOS password protection is implemented for security, then security is improved, but field engineers cannot access BIOS for diagnostic purposes
Solution Approach 1:
The patent segments password management by creating distinct password types: administrator passwords for security management and service passwords for field engineers. This segmentation allows different access levels - the ATM BIOS remains protected with administrator passwords while field engineers can obtain temporary service passwords for diagnostic purposes without compromising overall security.
Solution Approach 2:
The patent introduces an intermediary password management system that acts as a mediator between security requirements and field engineer needs. This system generates, distributes, and revokes service passwords automatically, allowing field engineers to access BIOS when needed while maintaining security through controlled password lifecycle management.
2Ease of operation
If field engineers are given BIOS passwords for service access, then ease of operation is improved, but security risk increases due to potential password leakage
Solution Approach 1:
The patent implements disposable, single-use service passwords that are generated temporarily for field engineers and automatically invalidated after use or expiration. These temporary passwords are akin to disposable keys - they provide necessary access when needed but cannot be reused, minimizing the impact of potential leakage since compromised passwords become useless after one use or expiration.
Solution Approach 2:
The patent makes password lifecycles dynamic by automatically generating, distributing, and revoking service passwords based on service needs. Passwords are not static but change over time - field engineers receive temporary passwords for specific service periods, and the system automatically rotates passwords to maintain security while enabling ongoing service access.
3Ease of manufacture
If manual password management is used, then ease of manufacture is improved, but productivity decreases due to physical visits required for password changes
Solution Approach 1:
The patent implements self-service password management where the system automatically generates, distributes, and revokes service passwords without requiring manual intervention from administrators. The password management system serves itself by automatically rotating passwords, notifying field engineers of temporary credentials, and invalidating expired passwords, eliminating the need for physical visits while maintaining simple operation through automated workflows.
Data Source
AI summary
A Basic Input/Output System (BIOS) agent on a Self-Service Terminal (SST) coordinates with a BIOS credential manager that determines when to communicate a BIOS credential for the SST and when to re-generate and re-set a new BIOS credential for the SST.