Java Encryption & Decryption Methods

In Java, common encryption and decryption methods include symmetric encryption and asymmetric encryption.

1. Symmetric encryption: Symmetric encryption uses the same key for both encryption and decryption. Common symmetric encryption algorithms include DES, AES, RC4, etc. In Java, you can use the Cipher class from the javax.crypto package for symmetric encryption. For more information, refer to the official documentation: https://docs.oracle.com/javase/8/docs/technotes/guides/security/crypto/CryptoSpec.html
2. Asymmetric encryption: Asymmetric encryption uses public and private keys for encryption and decryption. Common asymmetric encryption algorithms include RSA, DSA, etc. In Java, you can use the KeyPairGenerator class and Cipher class under the java.security package for asymmetric encryption. For more information, you can refer to the official documentation at: https://docs.oracle.com/javase/8/docs/technotes/guides/security/crypto/CryptoSpec.html

In addition to the two basic encryption and decryption methods mentioned above, data digest and verification can also be performed using message digest algorithms such as MD5 and SHA, as well as using digital signature algorithms to verify the integrity and authenticity of data. In Java, these functions can be implemented using the MessageDigest class and Signature class under the java.security package.