TOTP vs HOTP: What's the difference (and which is better)?

In the realm of digital security, Time-Based One-Time Password (TOTP) and HMAC-Based One-Time Password (HOTP) are two prevalent methods employed to enhance authentication processes by generating unique, temporary passwords for each login session or transaction. TOTP relies on a time-based algorithm that synchronizes with the current Unix time, rendering OTPs valid for short periods, thus boosting security but requiring precise time synchronization. Conversely, HOTP uses an event-based algorithm where OTPs are generated using a counter system, offering more flexibility as they do not expire until used, which can be advantageous for offline applications but poses a risk of desynchronization. The choice between TOTP and HOTP hinges on specific needs, such as security priorities, user experience preferences, and implementation resources. While TOTP generally provides higher security due to its time-sensitive nature, HOTP may be preferable for environments where time synchronization is challenging. Prelude.so offers advanced TOTP SMS verification and mobile onboarding solutions, catering to various industries by providing seamless and cost-effective user authentication processes.