RSA password large prime number generation method based on quantum true random number generator

The invention provides an RSA password large prime number generation method based on a quantum true random number generator. Quantum true random numbers are generated according to a measurement result of polarization state random distribution of a single-photon light source; the quantum true random number sequence is spitted into a large integer with a fixed length, whether the large integer is a prime number or not is checked, if the large integer is not the prime number, 1 is subtracted from the large integer and checking the prime number until a large prime number closest to the quantum true random number is obtained, a public key is generated by a receiver through the large prime number, and the public key is sent to a sender; and the sender encrypts plaintext information by using the public key and transmits a ciphertext to the receiver, and the receiver generates a private key by using the large prime number and decrypts the private key to obtain the plaintext information. The invention extracts a quant