由于JDK版本不同，在Java 8 update 161版本以后就會出現此問題，根本原因還是DH密鑰長度至少為512位，而DES算法密鑰沒有這么長，密鑰長度不一致引起的。

解決方法：

配置JVM的系統變量：-Djdk.crypto.KeyAgreement.legacyKDF=true

我的也是，怎么解決的 ?。?/p>

java.security.NoSuchAlgorithmException: Unsupported secret key algorithm: DES

at com.sun.crypto.provider.DHKeyAgreement.engineGenerateSecret(DHKeyAgreement.java:387)

at javax.crypto.KeyAgreement.generateSecret(KeyAgreement.java:648)

at com.wbs.security.dh.ImoocDH.jdkDH(ImoocDH.java:50)

at com.wbs.security.dh.ImoocDH.main(ImoocDH.java:24)

47????????KeyAgreement receiverKeyAgreement = KeyAgreement.getInstance("DH");

48????????receiverKeyAgreement.init(receiverPrivateKey);

49????????receiverKeyAgreement.doPhase(receiverPublicKey, true);

50????????SecretKey receiverDesKey = receiverKeyAgreement.generateSecret("DES");

jdk版本問題

這里的 DES。

//3.密鑰構建

KeyAgreement receiveKeyAgreement = KeyAgreement.getInstance("DH");

receiveKeyAgreement.init(receivePrivateKey);

receiveKeyAgreement.doPhase(receivePublicKey, true);

SecretKey receiveDesKey = receiveKeyAgreement.generateSecret("DES");