One-time passphrases

One-time passphrases (OTPs) are an excellent choice if one is concerned about keyloggers or spyware infections that may be collecting data from compromised machines. It’s strongly advisable to use one-time passphrases when accessing Clipperz from public terminals, such as those found in Internet cafes and libraries.

What is a one-time passphrase?

A one-time passphrase works like a regular Clipperz passphrase, but it can be used only once. If the same passphrase is used again at a later stage in a login attempt it will be rejected and the login process will fail.

Each one-time passphrase is 32 character long and it guarantees at least 128 bits of entropy.

How do I create and print one-time passphrases?

Go to the Account tab and select the “Manage your one-time passphrases” section. Click on the “New” button to add a new OTP. You can create as many as you need.

The available OTPs are listed in a table along with those already used. Clicking on the “Print” button opens a new browser window displaying the printable version of valid OTPs.

How do I login with a one-time passphrase?

Simply select the checkbox displayed below the passphrase field.
For your convenience the field will be split in 4 parts: just enter 8 OTP characters in each of them.

The OTP is case and space insensitive. Furthermore the validation process is smart enough to not get confused by the most common typing errors (e.g.: “0” for “O”, “1” for “l”, …).