Method for sequentially encrypting and decrypting singly linked lists based on double key stream ciphers

A method for sequentially encrypting and decrypting singly linked lists based on double key stream ciphers, comprising:

• establishing a plaintext set M according to a plaintext file, wherein the plaintext can be any resolvable file;
• using the plaintext set M as an initial set and performing sequentially iterative encryption to obtain a ciphertext set C, wherein a reference string, a key set P and an algorithm set A are used jointly in the iterative encryption, and the reference string is 2m bytes, where m>=0 and m is a positive integer;
• the iterative encryption carried out by a network computer comprises:
• acquiring any values of the plaintext set M, the ciphertext set C and the key set P as initial values and bit pointers corresponding to the initial values, performing 2m iterative encryptions on the plaintext set M through the bit pointers, the reference string and an encryption algorithm in the algorithm set A to obtain a ciphertext set C, wherein the plaintext set M and the key set P are not successive or hashed simultaneously as for a bit pointer used for encryption;
• for the ciphertext set C, performing multiple decryptions by calling the key set P, wherein the key set P and the algorithm set A are used during the encryption, wherein the key set P and the algorithm set A are shared by the encryption and the decryption, and the sets M and C are doubly circular linked lists, wherein the plaintext set M and the key set P are not successive or hashed simultaneously as for a bit pointer used for encryption;
• and
• wherein the decryption carried out by a network computer comprises:
• retrieving the iteratively encrypted initial values, establishing bit pointers corresponding to the initial values, performing two decryptions on the ciphertext set C in combination with the reference string and the encryption algorithm in the algorithm set A to obtain the plaintext set M, and converting the plaintext set M into a plaintext file.