🔐OTP with Cash provides an additional layer of security for two-factor authentication.
💻The primary device generates a unique OTP that is displayed to the user.
📱The user enters the OTP on the secondary device, which is authenticated by the system.
💡The OTP is short-lived and expires within a minute to enhance security.
🌐The system leverages a cache to store the OTP temporarily, improving performance and scalability.
Why do we need a cache for OTP with Cash?
—A cache is used to temporarily store the OTP for secure authentication. Since the OTP is short-lived and doesn't need to be persisted, a cache provides a convenient and efficient solution.
Can the OTP be any length?
—The OTP can be any length, but a typical implementation uses a shorter code for ease of use and better user experience.
Can the primary and secondary devices be the same?
—Yes, the primary and secondary devices can be the same, as long as they have different interfaces or apps to separate the entry of the OTP.
How long does the OTP last?
—The OTP typically expires within a minute, ensuring enhanced security and reducing the risk of unauthorized access.
What happens if the OTP is entered incorrectly?
—If the OTP is entered incorrectly, the authentication process will fail, and the user will need to generate a new OTP to retry the authentication.
00:00Introduction and announcement of a GitHub repository for problem coverage.
01:21Discussion about time spent preparing for video sessions.
04:29Explanation of the problem prompt and the use of OTP with Cash for enhanced security.
07:20Demonstration of variation one: OTP generated on primary device, displayed to user, and entered on secondary device for authentication.
09:19Overview of system design and components involved.
