54results about How to "Increase the difficulty of recognition" patented technology

The invention provides a reliable encrypted transmission system of quantum cryptography network, which includes an encryption processing module composed of an encryption strategy unit, a business data buffering and shunting unit, a classical encryption unit and a quantum encryption unit, and a ciphertext classification unit and a ciphertext data buffer unit. , a decryption processing module composed of a classical decryption unit and a quantum decryption unit. At the same time, the present invention also provides a reliable encryption transmission method for a quantum cryptography network, which adopts a classical encryption method and a quantum one-time pad encryption method for split transmission of business data, which can be changed in time according to the change in the supply and demand relationship of quantum keys. The proportion of business data distribution, on the basis of ensuring security, increases the continuity of encrypted transmission of business data, and improves the reliability of encrypted transmission of business data; at the same time, it reduces the consumption of quantum key data and the quantum cryptography network. The quantum key generation load reduces the cost of encrypted transmission of quantum cryptographic network business data.

The present application discloses a method for generating a picture verification code, which provides multiple character pictures, at least one character picture in the multiple character pictures is a nestable character picture, and at least one In the nesting position of the nested character picture; nesting part or all of the character picture into the nesting position of the nestable character picture to generate a picture verification code. The application also discloses a device for generating a picture verification code. The method and device for generating a picture verification code of the present application nest a plurality of character pictures, so that it is difficult for each character in the generated picture verification code to be linearly divided, so that the generated picture verification code is not easy to be detected by a computer. Program recognition, and will not increase the difficulty of people identifying the picture verification code.

The invention discloses a method for detecting the perception capacity of a motion sinusoidal grating for brightness modulation. The method includes the steps that a grating motion function is established based on the grating average brightness, the grating contrast,, the grating space frequency, the grating motion speed and direction, the grating azimuth and the grating phase; a first value is taken as the grating phase, A or B is taken as the grating motion direction, under the condition that other values are fixed values, the grating contrast Cz is taken and substituted into the grating motion function, and a grating motion graph is obtained; the grating motion graph is displayed to a testee; when the grating motion direction input by the testee and the grating motion direction of the grating motion graph are identical, Cz=Cz*(1-R) is substituted into the grating motion function till the input grating motion direction and the grating motion direction of the grating motion graph aredifferent, and a target grating motion graph is output; or else, Cz=Cz*(1+R) is substituted into the grating motion function till the input grating motion direction and the grating motion direction ofthe grating motion graph are identical, and the grating motion graph is output; the perception capacity of the testee is acquired according to the grating contrast of the grating motion graph.

The invention discloses an OTP memory, data writing and reading methods thereof and a security chip. The data writing method of the OTP memory includes the following steps: S1, carrying out block dividing on the OTP memory in physical space to form n+1 blocks of storage areas, wherein n is a positive integer which is greater than 1, and the n+1 blocks of storage areas include n blocks of data storage areas and one block of address storage area which is always in a readable state; S2, generating a random sequence through a random-number generator, randomly selecting one block from the n blocksof data storage areas according to the random sequence, and defining the same as an address recording area; S3, sequentially writing first addresses of n-1 blocks of data storage areas into the address recording area according to a random order, and writing to-be-stored data in each block of data storage area according to a successive order of writing; and S4, writing a first address of the address recording area into the address storage area which is always in the readable state. According to the data writing method and reading method of the invention, difficulty of acquiring the data, whichare stored in the memory, by a cracker can be increased, and storage security can be improved.