Krypton1

Website: http://overthewire.org/wargames/krypton/krypton0.html

According to the website page:

Welcome to Krypton! The first level is easy. The following string encodes the password using Base64:
S1JZUFRPTklTR1JFQVQ=
Use this password to log in to krypton.labs.overthewire.org with username krypton1 using SSH on port 2222. You can find the files for other levels in /krypton/

Let’s decode the string as base64.

So, we have our credentials!

Username: krypton1

Password:*************