461results about "Coding/ciphering apparatus" patented technology

The invention relates to a computer-based image encryption method using a Bessel map with high chaotic performance, which is developed to fill the gaps between a high performance chaotic map and a simple encryption scheme.

To provide a quantum hash value generation system with quantum resistance, a quantum hash value generation method, and a blockchain network.SOLUTION: A quantum hash value generation system 1 includes a quantum state generator 2 configured to generate an input quantum state based on input data composed of an input bit string including a plurality of input bits, a quantum device 4 configured to convert the input quantum state into an output quantum state, a quantum measuring instrument 5 configured to acquire measurement values of the output quantum state by measuring the output quantum state, a measurement value analysis unit 320 configured to calculate a statistical index of the measurement values based on a probability distribution of the measurement values, and a quantum hash value generation unit 340 configured to generate a quantum hash value of the input data based on the statistical index of the measurement values.SELECTED DRAWING: Figure 1

To provide a radio communication system and a communication method capable of safely relaying communication between a radio station connected to the Internet network and a radio station connected to a closed network.SOLUTION: The closed area system 11 and the cloud system 21 included in the wireless communication system 1 include a closed area side gateway server 13 and a cloud side gateway server 22. When receiving an authentication request from a radio station 41,42, a closed area side gateway server 13 and a cloud side gateway server 22 store activation information including unique information of the radio station 41,42 and generation information of an encryption key in a storage device 27. Regardless of whether the wireless station 41,42 is connected to the closed network 10 or the Internet network 20, the communication between the wireless station 41,42 and the closed system 11 or the cloud system 21 is protected by the encryption key generated based on the generation information included in the activation information.SELECTED DRAWING: Figure 1

An asset management system includes an asset management network that connects various types of refrigeration appliances to an asset manager. At the device layer, IOT devices are connected to the refrigeration appliances and have edge compute capability, including a backup power management function, and a modem for network communication. IOT device ports directly integrate with sensors, switches, and / or serial data controllers of refrigeration appliances. Push notification alarms are initiated on the edge of the network by IOT devices. The network tags operating data by appliance serial, and the asset manager stores the data using serial numbers as primary keys. The asset manager streams data from numerous appliances and uses event driven processing to promptly respond to edge alarms. The operating data keyed by serial number is enriched with proprietary data organized by appliance type and is used to develop new predictive models by appliance type.

The application provides an ECC attack-resistant method, device, equipment and medium suitable for a car security chip. The application adjusts the points accumulated in the scalar average decomposition method, so that the operation operations in each cycle are the same, that is, each cycle performs point multiplication and point addition. In this way, the branch in the operation process can be eliminated, the power consumption attack cannot identify the leakage of sensitive information, and the problem that the false operation mode cannot meet the high fault detection rate required by the car chip ISO 26262 is avoided. In the case of increasing a small amount of calculation and pre-storing points, the application can achieve the beneficial effects described above.

A transaction is pre-staged by providing transaction preferences, such as a financial instrument, a transaction type, and a transaction amount, to a user device. The user device captures a visual code at a terminal, such as an ATM. The visual code includes terminal attributes, including a signed hash and call-back URI. The user device authenticates the visual code using the signed hash and requests the transaction through the issuer server. The issuer server creates and sends the card data to the call-back URI. The terminal uses the card data to create a transaction request it routes to through its acquirer server.

The present application concerns the visual identification of materials or documents for tracking or authentication purposes. It describes methods to automatically authenticate an object by comparing some object images with reference images, the object images being characterized by the fact that visual elements used for comparison are non-disturbing for the naked eye. In some described approaches it provides the operator with visible features to locate the area to be imaged. It also proposes ways for real-time implementation enabling user friendly detection using mobile devices like smart phones.

Method and system for processing encrypted data comprising evaluating a client's encrypted data vector by at least one decision tree provided by a server. This method comprises, for evaluating a client's encrypted data vector by at least one decision tree (22) provided by a server (6), in a comparison phase: by a first execution environment, implementing a homomorphic encryption scheme, calculation (52, 54) of an evaluation vector, comprising encrypted components representing a difference between a component of the encrypted data vector and a decision threshold value associated with a corresponding node of said at least one decision tree, and providing the evaluation vector to a second execution environment which is a secure execution environment, executed by said server but controlled by said client.and by the second secure execution environment: - decryption (56) of said evaluation vector by applying a private key of said client, determination (58) of the sign of each component of the decrypted evaluation vector and provision of an encrypted sign vector to the first execution environment. Figure for the abstract: Figure 4,

To further enhance safety for data leakage in operation of a secret dispersion base MPC.SOLUTION: A device is a device for taking part in multi-party calculation of a secret dispersion base. Original data can be restored by combining a share that the device has and a corresponding share that other device has. The device includes means for acquiring a random number, and means for updating the share of the device based on the acquired random number. An updating method in the updating means is designed so that influence by the random number is canceled and original data is restored by combining a share of the device updated based on the acquired random number and a corresponding share of the other device updated based on the random number.SELECTED DRAWING: Figure 13

According to an aspect, there is provided a method of using physically unclonable functions, PUF. The method comprises determining a response (385) from each of a plurality of PUFs (105, 110-1, 110-2, 110-N), to a set of predetermined challenges (380) applied to each said PUF (650), the set of predetermined challenges including different challenges; and generating an output (390) to each of the set of predetermined challenges using the responses (355) from the plurality of PUFs (660) and a majority decision algorithm.

A kit for an encryption system characterized in that the kit consists of two mobile phones, a positioning device, several connecting elements, commercially available software for text, sound, image and video processing and a USB plug in which a camera, a light-sensitive photodiode, a laser diode, a microphone, a loudspeaker and a connector for fiber optic cables are arranged.

Relationships management systems, methods, and apparatuses are discussed herein. Techniques may include establishing, in a relationships management system, a user profile. The user profile may be associated with at least a first access level comprising a first plurality of functions and a second access level comprising a second plurality of functions. The first access level and the second access level may be defined based at least in part on input via a user interface.

This watermark embedding device includes: a watermark embedding unit that receives an electronic watermark and outputs embedding information for specifying a signature generation circuit in which the electronic watermark is embedded; and a signature generation unit that receives messages and outputs electronic signatures obtained by applying the signature generation circuit to the messages. However, the probability of how well the content of the electronic watermark can be identified by an interactive device on the basis of an operation is equal to or less than a reference, said interactive device performing said operation involving issuing any of the messages to a trial device to which the signature generation circuit can be applied and receiving the electronic signature obtained by applying the signature generation circuit to the message with the trial device.

In one embodiment, a method for combating side channel attacks in a system comprising a neural network comprising a block of processing elements is described. The method includes spatially disrupting an assignment map of an output of the neural network to the block of processing elements using a first random sequence generator, where the output of the neural network includes a series of multiply-accumulate (MAC) operations, and using a second random sequence generator to temporally disrupt the product of a series of MAC operations in a run sequence. A system for combating side channel attacks is also described in one embodiment.

A storage controller, a client system, and a method of operating a storage controller are disclosed. The client system includes a client host device and a client storage device including a storage controller and a storage memory. The storage controller includes a host interface, a processor configured to control read and write operations to the storage memory, and a homomorphic encryption and decryption accelerator configured to: based on receiving a read request from the client host device, perform homomorphic encryption on first plaintext data read from the storage memory to generate first homomorphic ciphertext data, and provide the first homomorphic ciphertext data to the client host device through the host interface; and based on receiving a write request from the client host device, perform homomorphic decryption on second homomorphic ciphertext data received through the host interface to generate second plaintext data, and write the second plaintext data into the storage memory.

A memory control unit of a memory device includes at least one hardware processor; and memory storing instructions that cause the at least one hardware processor to perform operations comprising: generating a scrambler seed and a logical block address (LBA) for a block of write data received by the memory control unit from a host device; generating a flash translation layer (FTL) to map the LBA to a physical address (PA); scrambling the block of data using the scrambler seed; encrypting the scrambler seed, the LBA, and the PA in the FTL using an encryption key; initiating writing a scrambled block of data and encrypted LBA and scrambler seed to a memory array; and decrypting the FTL using an incorrect encryption key in response to an erase command received by the memory control unit from the host device.

The present invention provides a ferroelectric structure containing a two-dimensional ferroelectric material that can realize an intrinsic random number generator using a single element, and a method for manufacturing the same. [Solution] The method for operating a ferroelectric structure includes the steps of: preparing a ferroelectric structure including a substrate 100, a lower electrode 200 placed on the substrate, a ferroelectric layer 300 placed on the lower electrode and containing a two-dimensional ferroelectric material, and an upper electrode 400 placed on the ferroelectric layer; applying an operating voltage to the ferroelectric structure so that polarization occurs in the ferroelectric layer; applying a readout voltage to the ferroelectric structure to obtain a current value that reflects the polarization state of the ferroelectric layer; and applying a removal voltage to the ferroelectric structure so that the ferroelectric layer returns to the state before polarization occurs.

Provided is an NTT acceleration chip, including: a twiddle factor computing module, including a plurality of pre-computing units and a plurality of real-time computing units, where the plurality of pre-computing units is configured to compute several initial lines of twiddle factors and an inter-line step factor in parallel by using a primitive root of unity; and the plurality of real-time computing units is configured to repeatedly and iteratively compute other lines of twiddle factors in parallel according to the inter-line step factor; a transposition module, including a plurality of transposition units, configured to perform transposition processing on an input sequence in parallel, to obtain a transposed sequence; and an NTT computing module, including a plurality of butterfly computing units, configured to perform a butterfly operation of orders and a point quantity in parallel according to the twiddle factors and the transposed sequence, to obtain an output sequence.

Leveraging stochastic physical characteristics of resistive switching devices to generate data having very low cross correlation among bits of that data is disclosed. Data generated from stochastic physical characteristics can also be referred to as physical unclonable feature—or function—(PUF) data. Additionally, error correction functions for PUF data generated from resistive switching memory cells are provided. The error correction functions facilitate additional redundancy and longevity of PUF data, among other benefits. Different embodiments include addressing arrangements to incorporate ECC parity bits among generated PUF data bits, even for differential PUF bits respectively defined by multiple memory cells in different portions of a resistive memory array.

The application discloses a general lightweight hash processing method and system and a storage medium. A linear feedback shift register (LFSR) is selected, and a register state conversion function is used to perform state conversion on the linear feedback shift register (LFSR). The output of the linear feedback shift register (LFSR) is used to initialize the internal state of a hash algorithm in combination with an initialization algorithm. Data for which a hash value needs to be calculated is input, and an update algorithm is used to update the initialized internal state. The data for which the hash value needs to be calculated is filled data. A determination algorithm is used to post-process the updated internal state to generate a final hash value. The application solves the speed and security problems of existing hash processing, is simple to implement, can flexibly adjust the length and starting point, is beneficial to parallel and rapid calculation, has small required storage space, and can dynamically append a hash word to eliminate collision when a hash collision occurs, thereby improving security.

Embodiments relate to a method and an electronic device for modifying a user interface of the electronic device. The method includes detecting, on the electronic device, a selection of a multi-keypad configuration among a plurality of multi-keypad configurations. Based on the selection of the multi-keypad configuration, a plurality of virtual keys are displayed on the user interface. The method includes receiving, on the user interface, a user touch gestures to configure one or more of the plurality of virtual keys to generate a virtual keyboard. The method includes updating machine learning models, image classifier models, and memory of the electronic device to update and store the generated virtual keyboard including the configuration of the one or more of the plurality of virtual keys to initiate user authentication in real time.

The secret distribution device has a true random number generation section that generates true random numbers, and a calculation section that performs secret distribution on a value obtained by multiplying k (k > 1) true random numbers from the true random number generation section, performs calculation on the inverse of one of the k true random numbers, and combines the inverse with one of the distributed values after secret distribution, and performs calculation on k sets of conversion random numbers.

To grasp whether data is appropriately used on a data user device to provide a contribution from a social viewpoint.SOLUTION: In a secret information processing system, a secret retrieval data administrator device stores both cipher text data obtained by encryption using a first secret key and an owner ID of a data owner device in a first database. A data user device stores a first secret key and a retrieval key that is associated with the first secret key and used for retrieval of cipher text data. A data monitor device stores both the owner ID and information on a report destination, in a second database. The data user device transmits a cipher text retrieval query obtained by encryption by the retrieval key, to the data administrator device. The data administrator device transmits, when receiving the cipher text retrieval query, both the owner ID associated with the cipher text data and the cipher text retrieval query to the monitor device. The monitor device registers the cipher text retrieval query and transmits a list of cipher text retrieval queries; and the data owner device obtains the list of cipher text retrieval queries.SELECTED DRAWING: Figure 8

An encryption processing apparatus processes a ciphertext. The ciphertext is a fully homomorphic ciphertext that has, as a plaintext associated with an integer, a value obtained by adding an error with a predetermined variance to a predetermined value and that is able to be subjected to a predetermined operation between integers without being decrypted. The apparatus includes a processor that performs a process including a calculation process of performing a scalar remainder operation on a ciphertext of a dividend based on a first polynomial obtained from a plaintext of a divisor to obtain a new ciphertext corresponding to a remainder.

A seed phrase storage device includes a holding rod and a sequence of encoding disks configured to represent a word in a seed phrase. Each encoding disk comprises an encoding disk hole and a physical representation of a number, where the encoding disk hole enables each encoding disk to slide onto the holding rod. The storage device includes at least one separator nut including a separator nut hole that enables the separator nut to attach to the holding rod. The at least one separator nut separates a first sequence of encoding disks and a second sequence of encoding disks. The storage device includes at least one anchor nut configured to secure the separator nut and the sequence of encoding disks to the holding rod.

The goal is to reduce data usage and storage capacity while also improving security. [Solution] The transmitting device of this communication system generates a plurality of first variance values ​​using a pseudo-random number generator based on a common key and random numbers, generates a distribution formula including the random numbers using an asymmetric ramp-type secret sharing scheme, generates a second variance value based on the distribution formula, and transmits the second variance value. The receiving device calculates at least a portion of the plurality of first variance values ​​using the common key, and recovers the secret information based on a portion of the plurality of first variance values ​​and the second variance value.

A device for generating at least one cryptographic key by selecting at least three input data selected among, on one hand, a predetermined data and, on the other hand, a function of at least one piece of data having a type belonging to the group including: a physical unclonable type, corresponding to physical unclonable function data, a hardwired type, corresponding to data hardwired within said device, and a software type, corresponding to software data, assembling the at least three input data to produce an assembled input data, and applying the assembled input data into a cryptographic element to produce a cryptographic key.

To provide novel technology that enables a large amount / capacity of data to be stored and enables information to be managed in a more secure manner.SOLUTION: In a file management method for distributed management of information among multiple nodes via P2P communication, a first node that uploads a target file subjected to distributed management executes: a splitting step of splitting the target file to create multiple split files associated with the target file; an encrypting step of encrypting the split files to generate encrypted split files; and a transmitting step of transmitting the encrypted split files and decryption information for decryption to another node.SELECTED DRAWING: Figure 1

Some embodiments are capable of distributing data (e.g., videos, photos, audio recordings, etc.) to multiple users in a manner that protects the privacy of the respective users. Some embodiments utilize homomorphic encryption and proxy re-encryption techniques to manipulate the respective data such that selected portions thereof are revealed depending on the identity of the user currently accessing the respective data.