This has proven more challenging than I expected. Of six participants, only five submitted actual answers. Only two of those cracked the second cipher.

As such, Solari et all have allowed me to give a hint to the third cipher. It's a special substitution cipher.

The first half of the decryption key is xgwvsrezfuhto.

That's actually a little more than half at thirteen character.

If you look closely, you might see an affinity with a clue for the second cipher, for those of you stuck on it.

Even should you crack the third cipher, there's still one more waiting for you after that. The last six letters of the decryption for the last cipher are saytdq.

Good luck.

~Tra'an Reith