Using the RSA-Encrypt-Body Spring Boot Starter for Unified Request and Response Encryption

Encrypting sensitive information is a common concern in software development, especially with increasing regulations on personal data leakage.

The article introduces the rsa-encrypt-body-spring-boot starter, which can uniformly encrypt request parameters and response bodies in Spring Boot applications.

Step 0x01 shows how to add the starter dependency in the pom.xml. Step 0x02 adds the @EnableSecurity annotation to the main application class. Step 0x03 configures RSA public and private keys in application.yml or application.properties. Step 0x04 demonstrates encrypting a response with the @Encrypt annotation, and step 0x05 shows decrypting incoming encrypted parameters using @Decrypt.

The author shares practical experience, noting that RSA requires chunked encryption for long data while AES handles long data easily, and provides a complete AES symmetric encryption utility class with example usage.

Finally, a recommended practice is to encrypt the AES key with RSA and use AES for encrypting the actual payload, combining asymmetric and symmetric encryption for secure data transmission.