Functional Specification Document (FSD)

Table of Contents

1. Introduction
2. Purpose
3. Scope
4. Definitions, Acronyms, and Abbreviations
5. References
6. Overview
7. Functional Requirements
   • Requirement 1: Implement 2FA
8. Data Requirements
9. User Interface Requirements
10. Non-Functional Requirements
11. Assumptions
12. Constraints
13. Acceptance Criteria
14. Appendix
15. Approval

Introduction

This document outlines the functional specifications for the project "Mike's Great Project," which aims to implement two-factor authentication (2FA) for enhanced security.

Purpose

The purpose of this FSD is to detail the functional requirements necessary to implement 2FA in the system. This document serves as a guide for the development team to ensure all requirements are met.

Scope

The scope of this document covers the implementation of 2FA for Mike's Great Project. This includes defining the functional requirements, data requirements, user interface requirements, non-functional requirements, assumptions, constraints, and acceptance criteria.

Definitions, Acronyms, and Abbreviations

• 2FA: Two-Factor Authentication
• FSD: Functional Specification Document
• OTP: One-Time Password

References

• RFC 6238: TOTP: Time-Based One-Time Password Algorithm
• RFC 4226: HOTP: An HMAC-Based One-Time Password Algorithm

Overview

Mike's Great Project aims to enhance the security of user accounts by implementing 2FA. This will require users to provide a second form of authentication in addition to their password, significantly reducing the risk of unauthorized access.

Functional Requirements

Requirement 1: Implement 2FA

• ID: FR-001
• Description: Implement two-factor authentication (2FA) to enhance the security of user accounts. Users must enter an OTP after entering their password.
• Priority: High
• Source: Security audit report
• Rationale: To enhance the security of user accounts and protect against unauthorized access.
• Acceptance Criteria: Users must be able to successfully complete the 2FA process by entering a valid OTP sent to their registered device. The system must deny access if the OTP is incorrect or not provided.
• Dependencies: User account registration and login functionality must be in place.

Data Requirements

• User Data: Information about users including username, password, and registered 2FA method (e.g., phone number for SMS OTP or email).
• OTP Data: Time-based or event-based OTP codes generated for each user session.

User Interface Requirements

• Login Screen: Modify the existing login screen to prompt for an OTP after the user enters their password.
• OTP Entry Screen: Create a new screen where users can enter the OTP sent to their registered device.

Non-Functional Requirements

• Performance: The 2FA process should not add more than 2 seconds to the average login time.
• Security: OTPs must be securely generated and transmitted to prevent interception or unauthorized use.
• Usability: The 2FA process should be straightforward and user-friendly.

Assumptions

• Users have access to the device registered for 2FA.
• The system can successfully send OTPs via the chosen method (e.g., SMS, email).

Constraints

• Internet connectivity is required for receiving OTPs.
• The system must comply with relevant data protection regulations.

Acceptance Criteria

• Users must be able to complete the 2FA process and gain access to their accounts.
• The system must deny access if the OTP is incorrect or not provided.
• The 2FA implementation must meet performance, security, and usability standards.

Appendix

• OTP Generation Algorithm: Details on the algorithm used for generating OTPs (e.g., TOTP or HOTP).
• Error Handling: Guidelines for handling errors during the 2FA process.

Approval

• Prepared by: Mike Meier
• Email: mikemeier@mad-tech.ai
• Date: 02/05/2025
• Approved by: [Approver's Name]
• Date: [Approval Date]