Time-limited One-Time Password is a cryptosystem that generates a one-off password using the currently logged computer time as a reference point. An extended version of the HMAC-based One-Time Password algorithm is widely used as the Internet Engineering Task Force (ITF) standard cryptographic tool. This secure key must be protected and cannot be used by any user except the authorized one. There are different versions of this cryptosystem like Shared, Derived and Time-limited Password, all of them offering an additional security level. But in general, a more muscular strength key, a fixed time duration and a limited number of attempts are provided.

Shared password:

Shared passwords are used in websites that are administered internally by a single company. The user needs a unique account key for accessing a particular site. It can be used for applications that require a fixed username and password, such as e-commerce applications, online banking and shopping.

Time-limited One-Time Password:

This is a cryptosystem that creates a one time password. Using a time-limit, a user can only enter a specified number of times (within a specific range), after which the password will be disabled, and a new one will be generated. A variety of versions of Time-Limited One-Time Password are available and include random number generators and finite-life cycles. They are used to provide strong authentication for data transmitted through networks. Also, a finite-life cycle version of this system is often included in a hardware product.

Anti-Top v2:

Security experts observed a significant increase in the use of an additional layer of authentication known as the Anti-Top v2. The v2 version added a second layer of security which prevents a user from merely deleting a previous session from their computer without unlocking the vault. However, v2 also has several weak points. An example includes the fact that it does not allow a user to recover a saved user ID and password, nor does it allow a user to use a previous password to unlock a secured container.

What is not?

Following a Danish company E-com acquires a presentation, totp was released as an open-source secure storage device. While it is free for anyone to download and use, there are a few caveats. Only a single user can use a single secured storage device. A smart card is also required to access some applications (though a business can provide it).

An application called Toting Software, based on the Open Source project Open TTP is required to implement the security features of what is totp. A secure network must be in place before a server can begin using a Toting Software client. An example of a secure network might be a VPN or a content filtering system. Once a Toting Software client is installed, a Toting Software administrator can set up a secure network that will allow a Toting Software Provider to manage their clients and give third-party applications access.