Decrypt this! #1

Hello world! This is my first puzzle in here.

Each question is an encrypted string which you have to decrypt and use as the answer.

Encryption was done using the same algorithm for all strings, but not necessarily with the same parameters each time. Thus, when you’ve answered Q1 (or any other question) you know the algorithm, but for the next questions you might have to try different parameters!

By parameters, I mean arithmetic parameters, passphrases, keys, anything that might be used to encrypt something. This is dependent on the algorithm.

Yes, you can find at least one tool online to decrypt the strings, this is NOT an algorithm I invented myself!

The GA behind the puzzle will remain open for 48 hours. Minimum level for entry is 1.

Each encrypted string is accompanied by a hint in parentheses which indicates the parameter(s) or key(s) used for it.
Extra hints shall be revealed in 40 hours from now. These will only help you find the parameter(s)/key(s) for each question, not the algorithm itself.

I think it’s obvious that anyone who gives out hints or solutions or shares the GA link in the comments will get blacklisted. Right? Right? RIGHT?

http://www.itstoohard.com/puzzle/DpgnUkjm

Let me know if you found it easy, challenging or plain difficult!