#cryptography challenge

[dragonoftheunderground]

I coded a cipher today. No clue how strong it is, so this'll be how I test it. I challenge the Internet (especially Tumblr) to break my cipher.

Ciphertext: &$5&.8Da*$t1;18ht%(ZsY=l~lhi;*JatJJVu$yjvd5<M]5j(TGc@Qq'UAd<YO{gX

Since I'm feeling confident, I'll also give you the key I used when encrypting: 0f3390a23dotuCipherChallenge

If you were to intercept a transmission in this cipher, you'd get the ciphertext and maybe the key. Getting the key is more likely if a system hasn't been agreed upon beforehand.

Throw whatever tools you want at it. Good luck.