49results about How to "Address privacy concerns" patented technology

Improved techniques for targeting advertisements are provided, which take into account the content of electronic communications delivered via text messaging and/or other forms of communications. The system may automatically select advertisements based on message content, and the selected advertisements may then be displayed alongside messages, and/or embedded in or included in messages, for presentation to the sender and/or recipient of the message. Overall conversational context, including content of past messages between the parties, can be taken into account in selecting advertisements. In at least one embodiment, the content of a displayed advertisement can change dynamically in response to changes in the subject of a text conversation. Senders of messages can be rewarded for allowing advertisements to be embedded and/or displayed in connection with their messages.

A biometric user authentication method, includes enrolling a user based on user's biometric samples to generate user's reference data; and authenticating the user based on a user's live biometric sample and the user's reference data; wherein enrolling a user includes acquiring the user's biometric samples; extracting an enrollment feature vector from each user's biometric sample; computing a biometric reference template vector as a mean vector based on the enrollment feature vectors; computing a variation vector based on the enrollment feature vectors and the mean vector; randomly generating an enrollment secret vector; computing an enrollment code vector based on the enrollment secret vector and the variation vector; computing a difference vector as a wrap-around difference between the enrollment code vector and the mean vector; computing an error correction vector based on the enrollment secret vector to enable error correction during the user authentication phase according to a given error tolerance level, wherein the error correction vector is not computed if the error tolerance level is equal to zero; and storing the variation vector, the difference vector, and the error correction vector as a part of the user's reference data to be used during the user authentication phase.

The invention provides an Internet of Vehicles privacy protection trust model based on a block chain. Vehicles on the road generate and broadcast messages through the vehicle-mounted ad hoc network toshare surrounding traffic information so as to improve the traffic efficiency and safety. However, due to the untrusted network environment of the vehicle-mounted ad hoc network, the privacy of the vehicle is easy to expose, and whether the received message is reliable cannot be judged. The message is anonymously sent by the vehicle through the ring signature technology, so that the vehicle is prevented from being tracked by a malicious vehicle. Messages sent by the vehicle are evaluated and screened through a reputation evaluation mechanism based on the block chain technology, and forged information in the messages is filtered. Based on the characteristics of the block chain, it is guaranteed that the vehicle reputation is not maliciously tampered, real-time synchronous updating of the vehicle reputation is achieved, and the safety and usability of the vehicle-mounted ad hoc network are further improved.

A video conference invitation is sent from a computing device in a first conference room to a second conference room for a video conference. Further, an acceptance of the invitation is received at the computing device. In addition, a list of available devices for video conferencing is retrieved from a device information database. The list of available devices indicates a locally connected device and a remotely connected device. The computing device is connected to the video conference through a platform independent interface. Further, the computing device locally controls operation of the locally connected device through a platform independent interface during the video conference and remotely controls operation of the remotely connected device during the video conference.

The invention discloses a method and a device for recognizing a user gender. The method comprises steps: application usage data of a user with an unknown gender are acquired, feature data with gender recognition are extracted from the application usage data of the user with an unknown gender, and according to the feature data of the user with an unknown gender, based on a gender classification model, gender recognition is carried out on the user with an unknown gender, wherein the gender classification model is determined through training feature data of application usage data of a user with a known gender. By adopting the method of the invention, the technical problem that in the case of user gender recognition in the prior art, the privacy of the user is possibly involved or the cost is high can be solved.

The invention belongs to the technical field of blockchains, and discloses a method for registration and verification of an Internet of Things identity based on a blockchain. The method comprises thefollowing steps: in an Internet of Things transaction, a sender reads and enters his identity information through a MAC, completes identity registration, and deposits identity information into an identity registration chain; the sender hashes the transaction information, generates a hash digest, records the hash digest as Y1, and encrypts the same with a private key to generate a digital signature; the sender initiates the transaction, and sends the signature, the hash digest Y1, and the corresponding public key to the whole network; nodes of the whole network verify the transaction information; and all nodes further determine whether the sender has been registered, and upload the transaction to the transaction chain if passing the two-factor verification. The method enables the identity of the transaction on the Internet of Things to be proved to be correct without revealing the identity of the trader through the blockchain technology, thereby avoiding the leakage of the trader's identity information during the transaction.

The invention relates to a user identity recognition and matching method based on face recognition technology. Through user device clients, faces of users are automatically acquired to serve as face identity characteristic images which are recorded in a system server. Target user identity images shot by user devices are allowed to match the face identity characteristic images recorded in the system server and user identities corresponding to the target user identity images are determined. According to the invention, by searching the face identity characteristic images which are recorded in thesystem server and match all users in position regions where the users are located, the searching range is shortened, search speed is improved and accuracy of recognition and matching is improved.

Security and privacy of tag information in an RFID-based system can be achieved through the usage of pseudonyms generated based on one-way hash functions. A system based on binary one-way trees allows for the scalable generation and decoding of authentication keys to obtain access to tag identities. The apparatus and methods described can also be adapted to provide limited access for readers to tag information.

A kind of mobile case history service method. It comprises: user mobile terminal sends user case history identification information to the medical case history service terminal device. The medical case history service terminal device receives user case history identification information from user mobile terminal, and sends case history service request information to the case history service center. The medical case history service center receives and process the case history service request information from medical service terminal device, and verify the validity of medical service request. The case history service center provides case history service by working with case history service terminal device and/or medical case history system. By using the unique number of user's mobile terminal, this invention can provide case history service to case history terminal device by the relevancy of mobile case history service center and case history accounts.

The invention discloses a method and device for accurately sensing indoor activities. The method comprises the steps that shake signals of the indoor floor are received through a plurality of shake sensors distributed according to a preset rule; the position of a shake source is judged according to the phase difference, in the different shake sensors, of the shake signals of the same shake source. By means of the method and device for accurately sensing the indoor activities, the indoor activities can be monitored on the premise of not disturbing a monitored person, and concern about leakage of the privacy of the monitored person can be eliminated.

The invention relates to the field of data security, and relates to a block chain technology-based fine-grained cloud storage access control method, system and device. The method comprises the following steps: constructing a cloud storage sharing model based on a block chain technology, registering a DO and a DU to an intelligent contract and generating a private key; the DO encrypting the data file with a symmetric key to obtain a data ciphertext, uploading the data ciphertext to the CSP, and the CSP returning a file storage address; the DO performing attribute-based encryption on the symmetric key and the file storage address according to the private key, the model public key and the access control policy tree, sending an attribute-based ciphertext to the block chain to form a block, and returning a block identifier; the DU sending a data request to the block chain, returning a corresponding attribute base ciphertext, and decrypting a file storage address and a symmetric key of the data file; and the DU sending a request to the CSP according to the decryption address, and decrypting the data file from the data ciphertext returned by the CSP by using the decrypted symmetric key. According to the invention, the security of key transmission and data transmission is ensured.

The embodiment of the invention relates to a federated learning classification tree construction method, a model construction method and terminal equipment. The method comprises the steps of carryingout the classification of a user sample set according to a first classification feature and a first classification threshold, and obtaining at least two groups of user sample subsets; adding confuseduser samples into the first subset to obtain a second subset; calculating the sum of the first encryption gradient values corresponding to the second subset; after the primary encryption gradient value is subjected to secondary encryption, sending the primary encryption gradient value and the second subset to a second data provider together; receiving the sum of the second encryption gradient values; performing primary decryption on the sum of the second encryption gradient values, and feeding back the sum of the second encryption gradient values, the sum of the first encryption gradient values, the information of the first classification feature and the information of the first classification threshold to the second data provider; receiving information of the optimal classification feature and information of an optimal classification threshold corresponding to the optimal classification feature; and classifying the first subset according to the information of the optimal classification feature and the information of the optimal classification threshold corresponding to the optimal classification feature to form branch nodes of a federated learning classification tree, and constructing the federated learning classification tree.

The invention relates to the technical field of terminal equipment, and discloses a notebook computer which comprises a front frame, a camera and a camera shielding device located between the front frame and the camera. A light transmission part opposite to the camera is formed on the front frame so as to transmit light required by the camera, the camera shielding device comprises a shielding plate movably mounted on the front frame, and the shielding plate comprises a light shielding area used for shielding the light and a light transmission area used for transmitting the light; wherein the shielding plate is provided with a first station and a second station in a moving path, and when the shielding plate is located at the first station, a shading area of the shielding plate is opposite to the camera; when the shielding plate is located at the second station, the light-transmitting area of the shielding plate is opposite to the camera; and the handle is used for manually shifting the shielding plate to move, is connected with the shielding plate and is positioned on the outer side of the front frame. According to the notebook computer, the shielding plate can be manually adjusted to move to the station where the camera is shielded, the problem of privacy of the camera of the notebook computer is solved, and safety is high.

The invention relates to the technical field of artificial intelligence algorithms, and particularly provides a federated learning model training method based on knowledge distillation, which comprises the following steps: receiving control parameters for model training from a server; training the initial first neural network model according to the control parameter and the local data sample to obtain a first model parameter; sending the first model parameter to the server; receiving a second model parameter of a second neural network model from the server; and utilizing a knowledge distillation method to enable the first neural network model to learn knowledge of the second neural network model, and training to obtain an updated first neural network model. According to the method, the existing data island problem is effectively solved by constructing the federated learning system, and meanwhile, the knowledge distillation module is added in the federated learning framework system, so that the algorithm model can be trained and optimized on the basis of knowledge of all training data at the same time; and the training effect of the federal learning framework system is further improved.

The invention discloses a hardware cipher-based mobile phone data protection method and device. The mobile phone data protection method comprises the following steps: whether a private data-related interface in a mobile phone changes is detected; if the private data-related interface changes, an interface used for inputting ciphers to be verified is sent to a screen of the mobile phone; whether the ciphers to be verified which are input by a user are consistent with an initial cipher stored in mobile phone hardware is determined; if the ciphers to be verified which are input by the user are inconsistent with the initial cipher for a designated number of times, an instruction of starting data protection is sent to the mobile phone. The mobile phone data protection device comprises an interface detection module, a cipher to be verified input interface sending module, a cipher verifying module and an instruction sending module that are respectively used for taking the above steps. Via use of the hardware cipher-based mobile phone data protection method and device provided in the invention, operation steps are simplified, user experience is improved, software decryption can be prevented, and data safety can be ensured.

The invention provides a video face changing method and device. The video face changing method comprises the steps of obtaining a to-be-processed image frame, performing key detection on a template image and a to-be-processed user image, adjusting key points to achieve alignment and superposition, migrating fusion of areas such as a face and skin color, restoring other parts, fusing a face contour mask image to a template, and performing replacement to obtain a face-changed image frame. The method can be realized locally, the privacy can be better protected, and the shape problems of light, skin color, five sense organs and the like are solved.

The invention discloses a multi-party security computing implementation method based on a blockchain technology. The method specifically comprises the following steps: step 1, compiling an intelligentcontract, wherein the intelligent contract comprises node information of each contract party, tasks of each contract party for executing the intelligent contract and task execution relationships among the tasks; step 2, publishing the intelligent contract: publishing the intelligent contract on the block chain; 3, determining an executable state: after the intelligent contract is authorized by related nodes of each contract party of the intelligent contract, determining the intelligent contract as the executable state; step 4, executing the intelligent contract, wherein different contract parties have own unique business accounts, log in node servers of nodes through node accounts of the nodes and execute tasks of the intelligent contract on the blockchain; and step 5, carrying out verification and recording of an execution result, wherein the nodes which do not participate in the intelligent contract carry out verification and state recording of the contract execution result. According to the invention, the problems of data security and privacy in the data cooperation process are solved.

Security and privacy of tag information in an RFID-based system can be achieved through the usage of pseudonyms generated based on one-way hash functions. A system based on binary one-way trees allows for the scalable generation and decoding of authentication keys to obtain access to tag identities. The apparatus and methods described can also be adapted to provide limited access for readers to tag information.

The invention discloses a bidirectional authentication method of a near field communication technology. The system comprises a real identity (ID) and a temporary identity (IDS) of a label held by thelabel and a back-end database together, and shared keys K1 and K2 of a current session, in addition, the label also needs to store a timestamp Tt required by authentication, and the back-end databasestores last and latest IDS and shared keys K1 and K2. The bidirectional authentication method has the advantages that the bidirectional authentication method for near field communication safety canbe provided, the safety of the bidirectional authentication method is proved through simple bit and exclusive OR operation without hash and other function encryption operation and BAN logic, bidirectional authentication can be achieved, and label anonymity, data integrity and confidentiality and non-traceability are guaranteed. Common attacks including denial of service attacks, asynchronous attacks, replay attacks, algebraic attacks and the like can be resisted. Compared with the traditional scheme, the protocol not only solves the security and privacy problems, but also reduces the calculation and storage cost.