You may specify this key as a MEMPTR, CHARACTER, or LONGCHAR value, but the AVM treats it as a RAW.
If the value of this attribute is the Unknown value (?), you must provide the encryption key as an argument to the ENCRYPT and DECRYPT functions.
The AVM compares the size of the specified encryption key to the key size specified by the cryptographic algorithm. If the key sizes are inconsistent, the AVM generates a run-time error.
The AVM obscures this attribute value to protect it against unauthorized access. You are responsible for generating, storing, and transporting this value.
Note: Do not use the GENERATE-RANDOM-KEY function to assign a key value to this attribute directly. Doing so will render the key irretrievable (as this attribute is write-only).