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我试图在java中实现Elliptic Curve Cryptography(ECC),因为java 7提供了支持椭圆曲线加密(ECC)的本机提供程序SunEC但是我总是收到错误java.security.InvalidKeyException:无效的密钥长度:91字节,因为椭圆我正在创建的曲线是不合适的.

我使用java 7我的任务是使用ECC生成加密和解密密钥

package com.acc;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.Provider;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Security;
import java.security.Signature;
import java.security.spec.ECGenParameterSpec;
import java.security.spec.ECParameterSpec;
import java.security.spec.EllipticCurve;

import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.spec.DESKeySpec;


public class TestECC {

    public static void main(String args[]) {
        try {
            Provider p[] = Security.getProviders();
            Provider p1 = Security.getProvider("SunEC");
            System.out.println(p1.getName());
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC", "SunEC");
            System.out.println(kpg.getAlgorithm());

            Cipher cipher = Cipher.getInstance("DES");
            System.out.println("provider=" + cipher.getProvider());

            ECGenParameterSpec ecsp = new …