public Boolean verifySignature(byte[] originalData, byte[] signedData) {
    boolean verified = false;

    try {
      Signature sig = Signature.getInstance("SHA1withDSA", "SUN");
      sig.initVerify(getPublicKey());
      sig.update(originalData, 0, originalData.length);
      verified = sig.verify(signedData);
    } catch (SignatureException ex) {
      ex.printStackTrace();
      Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null);
    } catch (InvalidKeyException ex) {
      ex.printStackTrace();
      Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null);
    } catch (NoSuchAlgorithmException ex) {
      ex.printStackTrace();
      Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null);
    } catch (NoSuchProviderException ex) {
      ex.printStackTrace();
      Logger.getLogger(SignatureVerifier.class.getName()).log(Level.SEVERE, null);
    }

    return verified;
  }