@Override
    public String toString() {
        return "SealedSharedKey{" +
                "version=" + version +
                ", keyId=" + keyId +
                ", enc=" + hex(enc) +
                ", ciphertext=" + hex(ciphertext) +
                '}';
    }
Attempts to unwrap a SealedSharedKey opaque token representation that was previously
created by a call to toTokenString().
security-utils/src/main/java/com/yahoo/security/SealedSharedKey.java