A decryptor allows you to use encrypted versions of the passwords for the MySQL database and Spinnaker p12 certificate (see configuration file format). Chaos Monkey will invoke the decryptor to decrypt the passwords before using them.
Chaos Monkey does not ship with any decryptor implementations. If you wish to use this functionality, you will need to implement your own.
If you wish to store your passwords encrypted and use a decryption system at runtime, you need to: