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import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.Signature;
import java.security.SignedObject;
import java.util.Vector;
public class MainClass {
public static void main(String[] args) throws Exception {
String alg = "DSA";
KeyPairGenerator kg = KeyPairGenerator.getInstance(alg);
KeyPair keyPair = kg.genKeyPair();
Vector v = new Vector();
v.add("This is a test!");
Signature sign = Signature.getInstance(alg);
SignedObject so = new SignedObject(v, keyPair.getPrivate(), sign);
System.out.println(so.verify(keyPair.getPublic(), sign));
}
}
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