A system for authenticating a requesting device using verified evaluators includes an authenticating device. The authenticating device is designed and configured to receive at least a first digitally signed assertion from a requesting device, the at least a first digitally signed assertion linked to at least a verification datum, evaluate at least a second digitally signed assertion, signed by at least a cryptographic evaluator, conferring a credential to the requesting device, validate the credential, as a function of the at least a second digitally signed assertion, and authenticate the requesting device based on the credential.

A data sharing method of a user device is provided. The data sharing method includes receiving, from a server device storing information, a private key corresponding to the information, performing a homomorphic encryption of the private key by a homomorphic encryption key provided from the server device, and generating a switch key, and uploading the switch key to a blockchain system. Accordingly, a more effective and clear data sharing is provided.

The present invention concerns a method for redacting an original document consisting of a matrix of pixels each defined by a vector having at least one numerical value, the method comprising implementation by data processing means (11) of equipment (1), of steps of: (a) Determining a set of pixels of said matrix corresponding to one or more areas to be blacked-out from the original document; (b) Generating a final document corresponding to the original document in which the vectors defining the pixels of said selected set are replaced by an arbitrary vector; (c) Generating a zero-knowledge proof of the fact that the pixel matrixes of the original document and of the final document only differ via pixels belonging to said selected set. The present invention also concerns a method for verifying the authenticity of a final document.

Embodiments disclosed herein generally related to a system and method of authenticating a user with a third party server. In one embodiment, a method is disclosed herein. A computing system receives, from a remote client device of the user, a token. The token includes personal identification information and a digitized file of a biometric captured by a biometric scanner. The computing system identifies via the personal identification information that the user has a user account. The computing system queries a database with the personal identification information and the digitized file to determine whether the biometric matches a stored biometric in the user account. Upon determining that the biometric matches the stored biometric, the computing system generates a message to be transmitted to the third party server that authenticates the user. The computing system transmits the message to the third party server.

An example system receives certificate requests from clients. Each request indicates: a number of computerized devices needing certificates; a timestamp indicating when the request was transmitted; and a client. The system includes a Quality of Service (QoS) manager that: distributes the requests from the clients across client queues, each of the client queues corresponding to a particular client; and divides requests into smaller subgroups of entries corresponding to a subset of the computerized devices needing certificates. It also includes a QoS arbiter that selects a sequence of entries from the client queues to be placed onto a QoS queue based on a number of entries in the QoS queue, a latency level of a certificate management service, and timestamps indicating when requests were transmitted, where the QoS manager retrieves entries from the QoS queue in the sequence selected by the QoS arbiter and transmits them to the certificate management service.

Examples described herein relate to systems, apparatuses, and methods for using tokens between two entities comprising a client device and a server, including receiving, by the server, a token from the client device, wherein the token is unique to a transaction, deriving, by the server, a server-derived token from the original data based on a transaction count, wherein the transaction count corresponds to a number of times that the original data is involved in transactions, comparing, by the server, the received token with the server-derived token, and responsive to determining that the received token and the server-derived token are same, sending, by the server, a verification message.

A random-number generation unit generates a plurality of random numbers from a plurality of seeds. A data scrambling unit conceals concealment target data which is a concealment target by using the plurality of random numbers generated by the random-number generation unit. A transmission unit transmits concealed data which is the concealment target data concealed by the data scrambling unit to a data analysis device, and transmits any seed among the plurality of seeds to the data analysis device, after transmission of the concealed data to the data analysis device.

Systems and methods for recording codes in a distributed environment are provided. A first node receives data including at least one code from a code generation computing device via a network. The first node adds a first new block to a first cryptographically verifiable encrypted ledger, the first block containing the at least one code. The first node adds a second new block to a second cryptographically verifiable, the second block containing the at least one code. The first node or a second node retrieves the at least one code from the second cryptographically verifiable unencrypted ledger. The first node or the second node analyzes the at least one code pursuant to a set of rules.

Within one or more instances of a computing environment where an instance is a self-contained architecture to provide at least one database with corresponding search and file system. User information from the one or more instances of the computing environment is organized as zones. A zone is based on one or more characteristics of corresponding user information that are different than the instance to which the user information belongs. User information is selectively obfuscated prior to transmitting blocks of data including the obfuscated user information. The selective obfuscation is based on zone information for one or more zones to which the user information belongs.

Precomputed and transactional mixing is believed to allow portable devices, such as smart phones, to send and receive messages, with little extra bandwidth or battery usage, while achieving anonymity for senders and recipients among all messages sent globally in batches defined by short time intervals. To learn anything about which inputs correspond with which outputs of such a batch of messages, the entire cascade of mix devices, each preferably operating independently in a different country, would it is believed have to be compromised.

None of the real-time computation, neither by the mixes nor smartphones, uses full public-key operationsresulting it is believed in orders of magnitude performance improvement over previously-known systems.

Aspects include untraceable return addresses, group chat, feed-following and large payloads. Transaction protocols include a variety of payments use cases. Limited anonymity and credential mechanism are based on a new approach to user identification disclosed, in which each user provides a small amount of different identifying information to each mix node, so that comparatively little is revealed to each node individually.