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 requirements and specifications for the implementation of Two-Factor Authentication (2FA) in our system. It serves as a guide for the development and testing teams to ensure that the project objectives are met.

Purpose

The purpose of this FSD is to provide a detailed description of the functional requirements for implementing 2FA. This is crucial for enhancing the security of our system by requiring an additional layer of authentication.

Scope

This FSD pertains to the implementation of 2FA for user authentication. It covers the requirements for the additional authentication step, user interface changes, and the necessary back-end modifications.

Definitions, Acronyms, and Abbreviations

• 2FA: Two-Factor Authentication
• OTP: One-Time Password
• SMS: Short Message Service
• Email: Electronic Mail
• User: An individual who uses the system

References

• Security Best Practices Documentation
• Existing User Authentication Module Specification

Overview

The goal of this project is to enhance the security of our system by implementing Two-Factor Authentication. This will require users to provide a second form of identification in addition to their password, thereby reducing the risk of unauthorized access.

Functional Requirements

Requirement 1: Implement 2FA

• ID: FR-001
• Description: Implement Two-Factor Authentication (2FA) to enhance security. Users will receive a One-Time Password (OTP) via SMS or email after entering their password.
• Priority: High
• Source: Security Team
• Rationale: To provide an additional layer of security and reduce the risk of unauthorized access.
• Acceptance Criteria:
  • Users are prompted to enter an OTP after entering their password.
  • OTP is sent to the user's registered phone number or email.
  • Users can choose their preferred method of receiving the OTP.
  • The system verifies the OTP before granting access.
• Dependencies:
  • Integration with SMS gateway and email server.
  • Existing user authentication module.

Data Requirements

• User Data: Phone number and email address must be stored securely.
• OTP Data: Temporary storage of OTPs for validation purposes.

User Interface Requirements

• Login Page:
  • Add an input field for OTP.
  • Provide options for users to choose how they receive the OTP (SMS or email).
• User Settings Page:
  • Allow users to update their phone number and email address.
  • Allow users to choose their preferred method of receiving the OTP.

Non-Functional Requirements

• Performance: The OTP should be delivered within 30 seconds.
• Security: The OTP should be valid for only 5 minutes.
• Usability: The process should be straightforward and user-friendly.

Assumptions

• Users have a valid phone number and email address registered in the system.
• Users have access to their phone or email at the time of login.

Constraints

• Network latency could affect the delivery time of the OTP.
• Limited to users who have a valid phone number or email address.

Acceptance Criteria

• Successful implementation and testing of the 2FA feature.
• Positive feedback from a user acceptance testing (UAT) group.
• No significant impact on the existing login process.

Appendix

• Sample OTP message content.
• Mockups of the updated login and settings pages.

Approval

• Prepared by: Mike Meier
• Email: MikeMeier@Mad-tech.ai
• Date: 01/27/2025
• Approved by: [Approver's Name]
• Date: [Approval Date]