6 results about "ID-based encryption" patented technology

A method for pairing a content provider system and a receiving device, a cryptographic function and a receiving device unique identifier being populated in the receiving device. According to such method, the receiving device executes: obtaining a first key which is a result of a first function taking as arguments an Identity Based Encryption scheme master key owned by an authority server and an output of the cryptographic function applied to the receiving device unique identifier; receiving, from the content provider system, a content provider unique identifier; and computing a secret key which is a result of a second function taking as operands the first key and an output of the cryptographic function applied to the content provider unique identifier, the secret key being known from the content provider system.

The application is suitable for the field of information security technology, and provides a certificate signature scheme based on an SM9 signature algorithm, which comprises the following steps: S100, system initialization calculation, a certificate authority generates a random number as a private key and calculates a public key, then randomly selects a signer private key and performs public key calculation to produce a signer private key pair; S200, certificate authorization, a signer provides identity information to the certificate authority, the certificate authority verifies the information according to the information and the key information, and calculates and generates a certificate after the information passes, and feeds back the certificate to the signer; and S300, signature calculation and the like. The application is based on the signature structure of the SM9 national secret algorithm, combines the advantages of traditional public key cryptography and identity-based encryption technology, and solves the problems of complex certificate management and key escrow. The scheme can resist attacks of Type 1 and Type 2 enemies at the same time.

The application discloses a cross-industry supply chain supervision method based on multi-chain cooperation, a business sub-chain is used for recording internal information of enterprise transaction subjects and business data of various supply processes; a transaction main chain is mainly responsible for transaction implementation and interaction between different businesses, and records circulation states and transaction data of commodities at various links of the supply chain; and a supervision chain is used for supervising and auditing transaction data between different businesses of the supply chain. The application combines an identity-based encryption mechanism based on fine-grained privacy protection, protects the privacy of multi-party cooperative transaction data in the supply chain process, and solves the contradiction between the privacy of supply chain transaction data and the implementation of supervision. The application designs two verification methods of transaction types based on an aggregated signature protocol, so as to realize aggregated verification of on-chain transactions and rapid tracking of abnormal transactions, and effectively improves the performance of system supervision and traceability.

This invention discloses the design and construction of a novel relationship-based identity-based encryption scheme. In identity-based encryption mechanisms, a user's identity information can be used as a public key, and a key generation center generates the user's decryption key. In scenarios where only users with specific relationships can decrypt, traditional identity encryption requires adding the relationship to the user's identity and regenerating the user's key. Furthermore, hierarchical identity encryption leads to upper-level users knowing the keys of lower-level users, resulting in the leakage of lower-level user information. To address this scenario where only users with specific relationships can decrypt, this invention provides a relationship-based identity encryption scheme that decomposes a user's decryption capability into two parts: one related to the user's identity information and the other related to the user's relationship information. Only users possessing both parts of the key can successfully decrypt, thus solving the problems of users regenerating keys and the issue of lower-level user keys being known to upper-level users in hierarchical identity-based encryption.

The present disclosure is directed to managing the operation of devices using identity-based cryptography. These techniques may include provisioning a master public key to each system that will communicate with a medical device using device-identifier specific cryptography. A master secret key is provisioned in a trusted processor of the medical device, and the medical device provisions its own device identifier-specific secret key using the master secret key. This setup facilitates several management features, including automatic initial configuration, signed logging, signed backup files, and secure binding of medication containers to the medical device.

The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose systems and methods to support identity-based Cryptography for signalling message protection in wireless communication networks, by splitting / fragmenting the digital signature into two or more fragments and making at least one of the fragmented value applicable to more than a cell, so that frequency / rate of transmission can be reduced for that fragmented part. Further, embodiments herein disclose systems and methods to broadcast the fragmented values at different intervals to reduce the over-the-air overhead and at the same time verifier able to acquire the required security parameter to verify the authenticity of the cell.