31results about How to "Guaranteed security strength" patented technology

The invention relates to a thick oil environment working device with a logo and a manufacturing method of the logo on the thick oil environment working device. The manufacturing method includes the step of recording a rectangular-ambulatory-plane shaped positioning icon and a long strip icon on the working device. Furthermore, the invention discloses a method and a device for identifying the logo. The method for identifying the logo includes the step: performing multi-information synchronization and identification on a code by using a two-dimensional searching and matching recognition algorithm, and realizing the digital management of the working device. Besides, the invention discloses an identity identification management system of an oil tube. According to the method for encoding and identifying the thick oil environment working device and the management system, the rectangular-ambulatory-plane shaped icon is convenient to position and identify, and also easy to record; the long strip icon is easy to record, clean and identify, and matched up with the principle of binary code; the recognition algorithm of the invention takes the two-dimensional searching and matching as the principle; by sampling a specific sampling point, the sampling frequency is reduced, the recognition scale is effectively improved and the integration of the encoding information is added; moreover, the recognition rate is greatly improved.

Embodiments of the present application provide a device registration method and device, a device authentication method and device, a device data transmission method and device, electronic devices, and computer-readable storage media. The registration method includes: before the registration of the device, reading the first SRAM value generated by powering on the device, and generating registration information according to the first SRAM value and sending it to the registration server for storage; when the device is registered, reading the first SRAM value of the device The second SRAM value generated by powering on the device, generates a registration request based on the second SRAM value and sends it to the registration server; wherein, the registration server searches the registration information for the first SRAM value that matches the second SRAM value according to the registration request, and completes this Device registration process; this technical solution only needs to read the SRAM value and register it to the registration server when the device is registered, and does not need to perform operations such as burning certificates on the device on the production line, which is convenient for device access and improves device authentication. Access flexibility.

The invention relates to a wood-plastic window frame section bar forming mould. The wood-plastic window frame section bar forming mould is sequentially connected to a neck mould a, a neck mould b, a neck mould c, a confluence board, a bracket board a, a bracket board b, a transition board, a mould body as well as a core rod from top to bottom through bolts, wherein a mould cavity formed by the neck mould a, the neck mould b and the neck mould c comprises a window frame opening cavity A and a window frame opening cavity B which are arranged left and right and are rectangular, the window frame opening cavity A is higher than the window frame opening cavity B; the opening part of the window frame opening cavity A and the opening part of the window frame opening cavity B are arranged upwards;the two sides of the opening part of each of the window frame opening cavity A and the window frame opening cavity B are inwards provided with short convex ribs, and the outer side of the window frameopening cavity A is further provided with a long convex rib; a plurality of soundproof cavities are arranged below the window frame opening cavity A and the window frame opening cavity B, and a plurality of reinforcing rib plates are arranged among the soundproof cavities; and the bottoms of the soundproof cavities are provided with a mounting long rib plate. The wood-plastic window frame sectionbar forming mould is simple and practical in structural design, is good in use effect, can guarantee safety strength while achieving the good soundproof effect, and also has a very high practical usevalue.

The invention relates to a sequence cipher realization device and a sequence cipher realization method thereof. The method comprises the following steps: firstly, generating a sequence source by adopting Galois-structure nonlinear feedback shift registers designed based on mixing and diffusion parts as a sequence source drive; and then, after the registers load keys, initialization vectors and constant parameters completely, carrying out idle operation for a certain number of beats, carrying out nonlinear operation on an output of the diffusion unit so that the output is taken as a key stream sequence, and carrying out exclusive or operation on the key stream sequence together with a plaintext sequence to form a ciphertext. According to the sequence cipher realization device and the sequence cipher realization method thereof disclosed by the invention, relatively less operation and hardware cost can be used; through combined use of the mixing unit and the diffusion unit, after multiple times of iterations, a pseudorandom sequence is output; according to hardware resource and speed requirements, the deployment and the implementation are flexible; and the requirements of communication for diverse networks and devices are met.

The invention discloses a safety helmet. The safety helmet comprises a helmet shell (1), an elastic buffer layer (2) and an inner layer (3), wherein a helmet brim (7) is arranged on the helmet shell (1), a bulge (4) is arranged on the top of the helmet shell (1), a first air hole (5) is formed at the joint of the bulge (4) and the top of the helmet shell (1), a second air hole (6) is formed in the side part of the edge of the helmet shell (1), and a protective cover (8) is arranged on the helmet shell (1); the elastic buffer layer (2) is made of silicone rubber, and massage bulges (9) are arranged on the elastic buffer layer (2); and the inner layer (3) is in an annular structure. The safety helmet is high in safety performance, good in protective effect, and rapid in heat dissipation, and can massage the head.