@Deprecated // Use getKeyLength()
        public int getNk() {
            return getKeyLength();
        }
Returns the length in bytes of a key for this algorithm.

@return AEAD Nk
@see <a href="https://www.rfc-editor.org/rfc/rfc9180.html#name-authenticated-encryption-wi">
        AEAD ids</a>
common/src/main/java/org/conscrypt/HpkeSuite.java