HashStringToBytes - convert a hex hash string to bytes */.

ToHex - converts a byte array to hex encoding with upper case */.

SecureSerializableValue - a proxy persisted value that just tracks the encoded bytes of a persisted value */.

Hashable - anything that can provide it's hash */.

SecureSerializableValueI an interface that makes a serializable value secure with hashing */.

Serializable interface */.