Provided an encrypted+serialized string (in Cryppo's encryption serialization format
which includes serialized key derivation artefacts), derive the key (using the entered
passphrase) and return the decrypted binary data.
Encrypts data with a key derived from passphrase
using keyDerivationStrategy, data must be provided in bytes
A EncryptionKey can be a symmetrical key or a key pair, which corresponds to
AES or RSA EncryptionStrategy