Systems and methods are described that enable trusted communications between two entities. In one implementation, a controller of a vehicle may include one or more processors configured to receive data and a controller signature from a second controller of the vehicle. The controller signature may be generated based on at least a first portion of the data. The one or more processors may be further configured to transmit the data and the controller signature to a gateway of the vehicle and receive a gateway signature from the gateway. The gateway signature may be generated based on at least a second portion of the data and transmitted to the controller after the gateway verified the controller signature. In addition, the one or more processors may be configured to verify the gateway signature and process the data.

Systems and methods are described that mitigates and/or prevents distributed denial-of-service (DDOS) attacks. In one implementation, a gateway include one or more processors configured to obtain network data from one or more entities associated with the gateway, provide the network data to a server, and obtain a set of entity identifiers from the server. The set of entity identifiers may be generated based on at least the network data. The one or more processors may be further configured to filter communications based on the set of entity identifiers.

Methods and systems for token transfer are described herein. A remote computing device may receive, from a mobile computing device, a public key of a public-private key pair. The public key may be associated with a first application of the mobile computing device. The first application may be configured to send credentials to a second application of the mobile computing device. The second application may be isolated from other applications executable on the mobile computing device. The remote computing device may receive, from the first application, a token. The token may have been previously issued to the first application and may have been encrypted, using the public key, by the first application. The remote computing device may send, to the second application, the token to enable the second application to authenticate with a plurality of services that interact with the second application.

A method includes receiving, in a data storage device, a request from a client computer for a portion of ciphertext stored in the data storage device, and providing, by a controller of the data storage device, the portion of the ciphertext to the client computer. The method also includes receiving, in the data storage device, an update token generated by the client computer from the portion of the ciphertext. The method further includes performing, by the controller of the data storage device, re-encryption of the ciphertext using the update token.

A security processor includes a key generator circuit configured to randomly generate a key, an encryption circuit configured to encrypt user data based on the key, and a security manager circuit configured to receive a first user identification (ID), which uniquely corresponds to a user of a device, and determine whether to allow access to the user data by authenticating the first user

ID.

A process for management of Internet-of-Things (IoT) devices includes a management system for identifying, interrogating, and updating devices connected to one or more networks. The management system can include a data store for storing various data related to the devices and the various processes of the management system. The management system can include a controller for executing processes such as interrogation processes, firmware change processes, credential change processes, and other processes. The controller can determine versions of firmware and other configuration properties of a device and generate various profiles for updating the firmware and other configuration properties. The controller can determine upgrade paths for updating the firmware and other configuration properties from a first version to a second version, the upgrade paths including one or more intermediary versions for facilitating the upgrade path. The management system can update devices individually, on a device family basis, or on a system-wide basis.

Methods, systems, and devices for data processing are described. Some systems may support data processing permits and cryptographic techniques tying user consent to data handling. By tying user consent to data handling, the systems may comply with data regulations on a technical level and efficiently update to handle changing data regulations and/or regulations across different jurisdictions. For example, the system may maintain a set of data processing permits indicating user consent for the system to use a user's data for particular data processes. The system may encrypt the user's data using a cryptographic key (e.g., a cryptographic nonce) and may encrypt the nonce using permit keys for any permits applicable to that data. In this way, to access a user's data for a data process, the system may first verify that a relevant permit indicates that the user complies with the requested process prior to decrypting the user's data.

Aspects of the disclosure provide a technological improvement to a cipher by improving data security of format-preserving encryption (FPE), by, inter alia, embedding specific key identifiers for rotating keys directly into ciphertext. Aspects of the disclosure relate to methods, computer-readable media, and apparatuses for improving data security in a format-preserving encryption (FPE) context by using specific methods of rotating and identifying the appropriate encryption key from among numerous rotating keys stored in a key data store. Specific to FPE, a plaintext of the data and its corresponding ciphertext of the data remain the same in length/size; yet the methods, computer-readable media, and/or apparatuses disclosed herein permit embedding of an identification of a specific key among the plurality of rotating keys for the particular ciphertext without compromising the technical requirements of FPE.

A device implementing a digital credential revocation system includes at least one processor configured to maintain a valid digital credential list, a revocation list, and a synchronization counter value. The at least one processor is configured to transmit a request to synchronize the valid digital credential list with an electronic device, the request including the valid digital credential list and the revocation list. The at least one processor is further configured to, in response to receipt of an updated valid digital credential list from the electronic device: clear the revocation list, replace the valid digital credential list with the updated valid digital credential list, and increment the synchronization counter value, and fulfill a received credential maintenance request when the received credential maintenance request comprises an other synchronization counter value that is greater than or equal to the incremented synchronization counter value, otherwise deny the received credential maintenance request.

In a method for conducting communications, a first terminal device in a vehicle-to-vehicle (V2V) network sends a first request message to a server of the V2V network to request the server to allocate an encryption key corresponding to a first service. The first request message includes an identifier of the first service and an identifier of the first terminal device. The first terminal device receives from the server a first response message that includes an encryption key corresponding to the first service. The first terminal device uses the encryption key to encrypt first information related to the first terminal device in the V2V network, and broadcasts a broadcast message that includes the encrypted first information to the V2V network.