Shall I set a passphrase or use the questions challenge?

Private.Ki gives an option between setting your own passphrase or using a built-in challenge for securing your account’s private key. Alternatively, you can skip the passphrase altogether.

This choice can be a bit confusing, so let’s clarify:

Setting a passphrase means you choose a secret phrase/password that only you know, which encrypts your data. Using the questions challenge means that we'll ask you a couple of questions (similar to "forgot your password" questions on other services).

Here's how it works:

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Choosing passphrase vs. questions challenge is choosing between maximum personal security (passphrase) and more convience (questions challenge). If you are comfortable remembering your passphrase and possibly foregoing easy recovery, setting a passphrase is the way to go for ultimate privacy. If you worry you might forget a passphrase or you want an easier login, the questions challenge method provides a safety net.

Read more about skipping the passphrase altogether here.