With the rapid development of network technology and information technology and the continuous improvement of computer computing speed, data encryption technology may not meet people's needs, and people urgently need new cryptographic systems. The future quantum cryptography, DNA cryptography, chaotic cryptography and other cryptographic technologies are being explored and studied. Quantum cryptography uses physical principles to protect information. Quantum encryption is the use of quantum to make passwords. It breaks through the constraints of traditional encryption methods, and the quantum state as the key is not replicable, which can be said to be absolutely safe.