PHP digital signature and encryption and decryption

• Chapter1 digital signature
• 1-1 Course Introduction
• 1-2 Server API interface communication and trust issues
• 1-3 API parameter passing and tamper prevention
• 1-4 Digital signature principle and generation algorithm
• Chapter2 Symmetric encryption and decryption
• 2-1 Usage scenario analysis and AES encryption and decryption (php5)
• 2-2 Usage scenario analysis and AES encryption and decryption (php7)
• 2-3 AES universal class library package
• Chapter3 Asymmetric encryption and decryption
• 3-1 Introduction to RSA algorithm
• 3-2 Generation of RSA public and private keys
• 3-3 RSA private key encryption public key decryption
• 3-4 RSA public key encryption private key decryption
• 3-5 RSA general class encapsulation