![]() ![]() Which one is better? Advantages of each OTP With TOTPs the moving factor is their limitation in time, while with HOTPs the moving factor is the counter that is activated with each event - a following code request. Both have a moving factor that changes them. The moving factor is the main difference between these two types of OTPs. Hence, if the user doesn't enter the one-time password in the set amount of time, the code won't be valid anymore. The duration of a timestep for a TOTP usually lasts between 30 and 180 seconds, but you can personalize this time lapse. TOPT stands for "time-based one-time password".Īs opposed to the previous type, these OTPs base their functioning on time sequences called timesteps. TOTPs are one-time passwords based on time. HOTPs aren’t usually based on time, instead they are valid until the following code is requested by the user. ![]() This token is sent to the user and is based on a hash algorithm, hence the name "hash-based one-time passwords". This kind of OTP consists of the generation of a token that only the user and the server can know. The generation of this type of code is based on a counter, that is activated and incremented with each event. HOTP stands for "hash-based one-time password", therefore it is based on hash-based message authentication codes. HOTPs are one-time codes based on events. These authentication codes can be based on events (HOTP) or on time (TOTP). One-time passwords are frequently used as a complementary authentication factor in multi-factor authentication processes, but it can also be the sole method to authenticate a user. In the unlikely event that a third user would take over the user’s device and hack the one-time code, this can only be used once. This makes OTPs a pretty secure system to recover accounts or add an extra layer of security to them. Unlike passwords, users can only use one-time codes once. It is usually compounded by 4 to 6 characters that the user has to enter in order to verify their identity. But what are HOTPs and TOTPs? Do you want to know the difference between them? Which one is more recommended? What is an OTP?Ī one-time password or OTP is a unique code that is sent to a user, normally to their email or phone. In general terms, two different types of OTPs can be distinguished - HOTPs and TOTPs. You probably used them as a user, but when it comes to implementing them in your own verification system, what kind of OTP is more suitable? OTP stands for "one-time password" and it is frequently used as an additional verification factor in multi-factor authentication systems. ![]() In order to protect users’ from password theft and account takeovers, multi-factor authentication with one-time passwords is heavily used. Protecting users’ identity online has become one of the most important challenges in the online world. ![]()
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