/** Verifies a signature with the data and a PublicKey
     *
     * @param signed the original data
     * @param signature the signature to be verified
     * @param publicKey the PublicKey that is alleged to have signed it
     *
     * @returns boolean true or false
     */
    static boolean verify(byte[] signed, byte[] signature, PublicKey publicKey){
        System.out.println("Verifying " + signed.length + "bytes");
        try {
            Signature signer = Signature.getInstance("SHA1withRSA");
            signer.initVerify(publicKey);
            signer.update(signed);
            boolean verified = signer.verify(signature);
            return verified;
        } catch (InvalidKeyException ex) {
            ex.printStackTrace();
        } catch (NoSuchAlgorithmException ex) {
            ex.printStackTrace();
        } catch (SignatureException ex) {
            ex.printStackTrace();
        }
        return false;
    }