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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

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