9 results about "Key-agreement protocol" patented technology

The application provides a data security encryption method and a smart wearable device, and the method comprises the following steps: performing a hash operation based on a current timestamp and a shared key to obtain a first key seed, performing a hash operation based on the first key seed and a data sequence to be transmitted to determine a second key seed; determining a mapped key symbol sequence based on the second key seed and a preset ring modulus, mapping the data sequence to be transmitted in the preset ring modulus to obtain a data symbol sequence; calculating a Lee distance bit by bit based on the mapped key symbol sequence and the data symbol sequence to obtain a Lee distance sequence, encrypting the Lee distance sequence and the mapped key symbol sequence on the preset ring modulus based on the Lee distance sequence to obtain an encrypted ciphertext symbol sequence; and generating a transmission data packet based on the encrypted ciphertext symbol sequence and the current timestamp and sending the transmission data packet to a receiving end. The application realizes the dynamic key and the anti-cracking capability without relying on a complex key agreement protocol, and improves the data transmission security.

Systems and methods herein describe privacy preserving multi-touch attribution. The described systems access a plurality of impression events and a plurality of conversion events, and for each impression event and each conversion event, wherein each impression event and each conversion event are associated with user identifiers, the described systems generates a hashed user identifier based on the associated user identifier, initiates a key agreement protocol comprising a key, generates an encrypted identifier by encrypting the hashed user identifier with the key, and stores the encrypted identifier.

The invention provides an anti-quantum security authentication and key agreement method and system for cloud-side-end cooperation, and belongs to the field of security communication of the Internet of Things. The problem that when an existing lattice-based identity authentication and key agreement protocol is deployed for the large-scale and resource-limited Internet of Things, the calculation overhead is large, the energy consumption is high, and the protocol lacks the dynamic updating capability is solved. According to the method, four-stage safety life cycle design of system initialization, equipment registration, bidirectional authentication and key negotiation and dynamic key is combined, quantum attacks can be effectively resisted, the exposure of the real identity of the terminal is avoided, and the calculation and energy consumption overhead of resource-constrained equipment is reduced, so that efficient, extensible and safe identity authentication and key negotiation are realized.

This invention provides a lightweight quantum-resistant key negotiation protocol method and system for edge computing, relating to the field of edge computing security technology. The method includes generating a short vector private key and a public key multinomial matrix based on lattice cryptographic parameters, embedding an identity digest vector into the public key to form an identity-binding public key, generating a dynamic lattice basis chain through recursive reconstruction, and adaptively sparsifying the session parameters using a resource weight vector to finally generate a lightweight session key. This method is resistant to quantum attacks and can be dynamically adjusted according to the computing performance and communication bandwidth of edge nodes, reducing resource consumption.

The application discloses a label privacy set intersection method with enhanced information protection, and relates to the technical field of privacy calculation. The method is initiated by a data demander and is executed together with a data and label holder. The method comprises the following steps: the two parties adopt an inverse Diffie-Hellman key agreement protocol variant on an elliptic curve, add a data disordering operation, and obtain matching data indexes after anonymization; the data demander adopts an inverse process of the disordering operation to restore original data indexes of the intersection set; the two parties execute an inadvertent transmission protocol, and the data demander obtains labels corresponding to intersection data. The method can screen data label information meeting certain characteristics without leaking any data participating in the intersection to the participants, and can maintain the privacy of data other than the labels.

The present invention relates to a backup device for securely transferring state data from a first secure element to a second secure element, the device comprising: - a communication interface configured to establish a secure communication link with the first secure element of a user device, wherein the user device is a smartphone or tablet comprising an eUICC; - a processing unit configured to issue a backup command to the first secure element and receive a backup payload in response - a second secure element configured to store said backup payload; wherein the processing unit is further configured to process the backup payload as a data structure representative of internal state information, secret keys, secret phrases, identity data, cryptographic counters, parts of an eSIM profile, and / or applets executed on or stored in the first secure element, and wherein the backup payload is encrypted by the first secure element using a symmetric key derived from a shared cryptographic session and / or the processing unit is configured to perform a key agreement protocol with the first secure element.

This invention discloses a decentralized key negotiation method and system for weak network environments, comprising: discovering a set of devices participating in the negotiation, including statically configured neighboring devices and online devices dynamically discovered through multicast; determining the negotiation initiator based on the IP address of each device; exchanging negotiation messages with the target device, executing a key negotiation protocol for a preset number of rounds, generating a shared key using the elliptic curve Diffie-Hellman algorithm, and performing bidirectional key consistency verification using message verification codes; during the key negotiation process, performing immediate retransmission of negotiation messages based on sequence numbers and selective acknowledgment mechanisms, and dynamically adjusting the retransmission timeout threshold according to the round-trip time. This invention achieves efficient and reliable key negotiation between cryptographic devices in weak network environments without relying on a central coordinator, significantly improving the negotiation success rate and transmission efficiency.

Systems and methods herein describe privacy preserving multi-touch attribution. The described systems access a plurality of impression events and a plurality of conversion events, and for each impression event and each conversion event, wherein each impression event and each conversion event are associated with user identifiers, the described systems generates a hashed user identifier based on the associated user identifier, initiates a key agreement protocol comprising a key, generates an encrypted identifier by encrypting the hashed user identifier with the key, and stores the encrypted identifier.

A method for pairing a key fob with a control unit is provided. The key fob executes an ID authenticated key agreement protocol with a pairing device based on a key fob identification to authenticate one another and to generate a first encryption key. The pairing device encrypts a control unit identification using the first encryption key. The key fob receives the encrypted control unit identification transmitted from the pairing device. The key fob then executes an ID authenticated key agreement protocol with the control unit based on the control unit identification to authenticate one another and to generate a second encryption key. The key fob then receives an operational key transmitted from the control unit that is encrypted with the second encryption key.