6 results about "Commutative encryption" patented technology

A method for exchanging a cryptographic key between a sender and a receiver using a neutrino-based communication channel, comprising the steps of: Sender-side generation of a neutrino beam by: - ​​accelerating protons in a proton beam, - deflecting the proton beam onto a target to produce neutrinos through the decay of short-lived particles; Sender-side generation of a sequence of random bits representing the cryptographic key, and encoding of the random bits by: - ​​controlling the deflection of the proton beam by means of a controllable deflection system to direct the proton beam either onto the target or onto an absorber according to the random bits, thereby encoding the random bits as neutrino pulses; transmission of the neutrino pulses from the sender to the receiver;Synchronization of transmitter and receiver by means of a time synchronization unit that synchronizes the timing of the generated neutrino pulses with time windows of the receiver system; reception of the neutrino pulses by a neutrino detector of the receiver, wherein: - decay products, in particular light signals, which are generated during the interaction of the neutrinos with a detector medium are detected and - the detected signals are each assigned to a key bit; storage and concatenation of the received key bits to generate the cryptographic key, which is stored in a key storage module of the receiver.

The invention relates to the technical field of edge computing, and discloses an incremental updating method for edge equipment, which comprises the following steps: constructing a communication network according to a network access request of the edge equipment; inputting the newly added task into a layered adapter of the edge device, and outputting a gradient difference; the gradient difference is converted into encryption gradient fragments through an encryption algorithm, and the encryption gradient fragments are sent to neighbor equipment in the communication network through a security tunnel; performing an encryption operation on each encryption gradient fragment through an addition homomorphic encryption algorithm to generate a ciphertext gradient fragment, and performing a ciphertext aggregation operation and a random blinding operation on the ciphertext gradient fragment to generate a global gradient; and decrypting the global gradient to generate a plaintext gradient sum, and executing an incremental updating operation on the layered adapter according to the plaintext gradient sum. According to the invention, the plurality of edge devices generate the gradient difference of the adapter through the local data, exchange the encrypted gradient fragments through the communication network, update the local adapter, and improve the communication efficiency and update performance.

In some examples, a wireless communication network establishes a data bearer through a wireless communication network for a wireless communication device. The wireless communication network restricts communications over the data bearer to network control and encryption establishment. The wireless communication network exchanges cryptography data over the data bearer between the wireless communication device and an external security service. The wireless communication network determines that the wireless communication device and the external security service have established the encryption over the data bearer, and in response, removes the communication restriction from the data bearer. After the communication restriction is removed, the wireless communication network exchanges encrypted data over the data bearer between the wireless communication device and the external security service.

This invention discloses a privacy-preserving routing method for mobile social networks based on exchangeable encryption, comprising: (1) system setup: setting up a mobile social network including trusted organizations (TAs), fixed networks, and mobile nodes; (2) degree centrality calculation: determining whether the identifier sets of the nodes that meet have an intersection. If there is no intersection, the nodes perform bidirectional authentication. If the authentication is successful, a global degree centrality calculation is performed. Then, it is determined whether the two nodes are in the same group. If they are in the same group, a local degree centrality calculation is performed; (3) routing efficiency value calculation: after the degree centrality of the two nodes meets anonymously and completes the calculation, the routing efficiency value is calculated for the messages in the cache of both nodes. m (3) Calculate the routing efficiency value of the node; (4) Message forwarding: When two nodes meet, their efficiency values ​​are compared. If the efficiency value of the other party is greater than that of the node itself, the message is sent to the other party. This method can protect the privacy information of all nodes without relying on a third-party trusted institution (TA) and simultaneously calculate the social metric value of node degree centrality and perform message forwarding.

Methods and systems have been developed for establishing a secured connection for data transmission. A first digital certificate is generated for a non-display device. This first digital certificate verifies the identity of the non-display device and enables encrypted connections. A second digital certificate is generated for a mobile device that uses a Bluetooth wireless communications standard protocol. The second digital certificate verifies the identity of the mobile device and enables encrypted connections. The mobile device then scans for a generic attribute (GATT) Bluetooth profile of the non-display device. Upon matching GATT properties, an encrypted connection that utilizes the Bluetooth protocol is initiated between the non-display mobile devices. An encrypted data channel is established between the non-display device and the mobile device upon successfully pairing the non-display device and the mobile device by exchanging the first digital certificate and the second digital certificate for authentication and exchanging RSA encryption keys.

A method, in a server, for exchanging cryptographic keys for quantum-secure communication between the server and a client. The method includes: receiving a request message for a secure communication channel from a client, including at least one quantum-secure public ephemeral key and a first secret text; decapsulating the first secret text with a decapsulation function using a quantum-secure secret static key of the server, including generating a first secret; encapsulating the quantum-secure public ephemeral key with an encapsulation function including generating a second secret text and a second shared secret; encapsulating a quantum-secure public static key of the client using the encapsulation function, including generating a third secret text and a third shared secret; generating symmetric keys using at least the first, second, and third secrets; and sending a response message to the client, including the second and third secret texts.