A computer-implemented method comprising: establishing, by an operation device, a wireless communication with a remote device; authenticating, by the operation device, the wireless communication with the remote device; receiving, at the operation device, a first command to perform a first operation; establishing a first maximum delay period using an estimated time delay, wherein the estimated time delay comprises an authentication delay, an encryption delay, or a combination thereof; determining, by the operation device, that the first command is received within a first maximum delay period; performing, by the operation device, the first operation; receiving, at the operation device, a second command to perform a second operation; establishing a second maximum delay period using the estimated time delay; determining, by the operation device, that the second command is received within a second maximum delay period; and performing, by the operation device, the second operation instructed in the second command.

Methods and systems for consensus-based online authentication are provided. An encryption device may be authenticated based on an authentication cryptogram generated by the encryption device. The encryption device may transmit a request for security assessment to one or more support devices. The support devices may individually assess the encryption device, other security devices, and contextual information. The support devices may choose to participate in a multi-party computation with the encryption device based on the security assessments. Support devices that choose to participate may transmit one or more secret shares or partial computations to the encryption device. The encryption device may use the secret shares or partial computations to generate an authentication cryptogram. The authentication cryptogram may be transmitted to a decryption device, which may decrypt the authentication cryptogram, evaluate its contents, and authenticate the encryption device based on its contents.

A method and system are provided for updating an elliptic curve (EC) base point G, with the EC basepoint used in encryption and coding of video data. A candidate base point G is generated that includes additional data used for validation purposes and checked as a valid base point before transmission and use.

A communication method according to an embodiment of the present disclosure includes establishing, by a second terminal, a connection with a first terminal through a first communication channel that uses a first protocol, receiving, by the second terminal, a first message including a public key of the first terminal from the first terminal through the first communication channel, storing, by the second terminal, the public key of the first terminal, transmitting, by the second terminal, a second message including a public key of the second terminal to the first terminal through the first communication channel, and generating a first secret key.

A coordinating network element manages a protocol that prohibits the coordinating network element from substantively accessing data content that, at least in part, underlies received protocol-compliant requests. By one approach, these teachings provide for preventing substantive access to data information that is included within the protocol-compliant request in tokenized form, wherein the tokens are generated using secrets, at least one of which is unavailable to the coordinating network element.

A method for conveying auditable information regarding provenance of a product that is cryptographically accurate while retaining complete anonymity of product and participant on a blockchain includes: receiving a product identifier; generating a digital token by applying a hashing algorithm to the product identifier; generating an entry value by applying the hashing algorithm to a combination of an event identifier and the digital token; generating a digital signature by digitally signing a data package using a private key of a cryptographic key pair, where the data package includes at least a blockchain address, the event identifier, and the digital token; and transmitting the blockchain address, the digital signature, and the entry value to a node in a blockchain network.

A verifier device in one embodiment is configured to communicate over one or more networks with a client device and a server device. The verifier device participates in a three-party handshake protocol with the client device and the server device in which the verifier device and the client device obtain respective shares of a session key of a secure session with the server device. The verifier device receives from the client device a commitment relating to the secure session with the server device, and responsive to receipt of the commitment, releases to the client device additional information relating to the secure session that was not previously accessible to the client device. The verifier device verifies correctness of at least one characterization of data obtained by the client device from the server device as part of the secure session, based at least in part on the commitment and the additional information.

An electronic device and a method for performing a peer to peer (P2P) service in the electronic device are provided. The electronic device includes a communication module, a processor, a memory, and a security module, wherein the memory may be configured to store instructions that, when executed, enable the processor to receive a public key from an external electronic device as a P2P service is requested, transmit, to the external electronic device, an authentication certificate chain generated on the basis of the received public key via the security module, verify an authentication certificate chain received from the external electronic device by using a root authentication certificate stored in the security module, receive encrypted information of the external electronic device from the external electronic device, decrypt the encrypted information of the external electronic device by using a shared key generated according to a result of the verifying of the received authentication certificate chain, and perform the P2P service with the external electronic device via the communication module, on the basis of the decoded information of the external electronic device.

A method for learning a shared machine learning model while preserving privacy of individual participants is provided. The method includes: receiving, from each of a group of users, an encrypted user input; when a number of user inputs is greater than or equal to a threshold, transmitting, to each user, a list of the group of users; receiving, from each user, a message indicating a mutual agreement regarding a shared secret among the group; and when a number of received messages indicating the mutual agreement is greater than or equal to the threshold, determining information about the shared machine learning model by combining the received encrypted user inputs. The shared machine learning model facilitates a secure multi-party computation of a function that generates an updated version of the shared machine learning model.

A terminal device may obtain a third public key of a communication device, in a case where the third public key is obtained, send a third authentication request in which the third public key is used to the communication device, receive a third authentication response from the communication device, and send third connection information to the communication device. The third connection information may include a first identifier and a second identifier, the first identifier for identifying a first wireless network in which a first access point operates as a parent station, and the second identifier for identifying a second wireless network in which a second access point operates as a parent station.