41results about How to "Reduce encryption time" patented technology

A method of elliptic curve encryption includes, (a) selecting an elliptic curve Ep (a,b) of the form y2=x3+ax+b mod (p) wherein a and b are non-negative integers less than p satisfying the formula 4 a3+27b2 mod (p) not equal to 0; (b) generating a large 160 bit random number by a method of concatenation of a number of smaller random numbers; (c) generating a well hidden point G (x,y) on the elliptic curve Ep (a,b) by scalar multiplication of a point B (x,y) on the elliptic curve with a large random integer which further includes the steps: (i) converting the large random integer into a series of powers of 231; (ii) converting each coefficient of 231 obtained from above step into a binary series; (iii) multiplication of binary series obtained from steps (i) and (ii) above with the point B (x,y) on the elliptic curve; (d) generating a private key nA (of about >=160 bit length); (e) generating a public key PA (x,y) given by the formula PA (x,y)=(nA−G (x,y)) mod (p); (f) encrypting the input message MSG; (g) decrypting the ciphered text.

The image encryption method based on bit-level scrambling and network diffusion relates to the field of image encryption technology and solves the problem of conflicting existing image encryption efficiency and security. The image encryption method based on bit-level scrambling and network diffusion proposed by the present invention, The scrambling process converts the pixel plane into a bit-level plane, and performs bit-level pixel scrambling on the basis of the bit-level plane. The diffusion part uses the "simplified Feistel network" diffusion method to perform diffusion operations on pixels, which improves the diffusion efficiency and greatly The encryption time is reduced, and the safe encryption effect is achieved while ensuring the operation speed.

The image encryption method based on bit-level scrambling and dynamic superposition and diffusion relates to the field of image encryption technology and solves the problem of conflicting efficiency and security of existing image encryption. The image encryption based on bit-level scrambling and dynamic superposition and diffusion proposed by the present invention The method includes an encryption process and a decryption process. In the scrambling process of the present invention, the pixel plane is converted into a bit-level plane, and bit-level pixel scrambling is performed on the basis of the bit-level plane. The overlapping diffusion operation improves the diffusion efficiency, greatly reduces the encryption time, and achieves a safe encryption effect while ensuring the operation speed.

This application discloses a cloud storage encryption, decryption and verification method and system, which is applied to a data upload terminal, including: generating temporary ciphertext in advance using the encryption parameters used for encryption in the system public parameters; using the system public parameters for verification Complete data verification parameters, temporary ciphertext, plaintext data, and access structure to generate outsourced ciphertext; send outsourced ciphertext to the cloud server; this application pre-uses system public parameters for encryption when the data upload terminal has sufficient energy The encryption parameters are used to generate temporary ciphertext, and the part of the encryption process that consumes too much energy in the encryption process using the system public parameters for encryption is preprocessed in advance, so that even in the case of insufficient energy, the amount of calculation when encrypting data is reduced. And energy consumption, you can directly use the temporary ciphertext, verification parameters, plaintext data and access structure to generate outsourced ciphertext, shorten the encryption time, and reduce the amount of calculation and energy consumption.