@Override
    public String getEncryptionKeySetting() {
        return "cas.tgc.crypto.encryption.key";
    }
This is {@link TicketGrantingCookieCipherExecutor} that reads TGC keys from the CAS config
and presents a cipher.

@author Misagh Moayyed
@since 5.0.0
core/cas-server-core-util-api/src/main/java/org/apereo/cas/util/cipher/TicketGrantingCookieCipherExecutor.java