[轉]java生成3DES對稱祕鑰和RSA非對稱祕鑰

/*1、對稱加密3DES祕鑰生成*/
KeyGenerator kg = KeyGenerator.getInstance("DESede");
kg.init(112);//must be equal to 112 or 168
System.out.println("SecretKey:");
System.out.println(new BASE64Encoder().encode(kg.generateKey().getEncoded()));

/*2、非對稱加密RSA公鑰和私鑰生成*/
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");  
keyGen.initialize(512);//RSA keys must be at least 512 bits long
KeyPair key = keyGen.generateKeyPair();
System.out.println("PublicKey:");
System.out.println(new BASE64Encoder().encode(key.getPublic().getEncoded()));
System.out.println("PrivateKey:");
System.out.println(new BASE64Encoder().encode(key.getPrivate().getEncoded()));

[quote]引自：[url]http://my.oschina.net/h2do/blog/370684[/url][/quote]