4 results about "Cryptographic hash function" patented technology

The application discloses a product identity verification method fusing a two-dimensional code and a visual fingerprint, comprising the following steps: obtaining two-dimensional code information of a product to be verified, guiding and collecting a high-definition image of a preset feature anchor area of the product based on an associated digital twin model through AR technology; performing geometric and illumination correction preprocessing on the image, extracting a to-be-verified visual fingerprint vector with local invariance and global depth texture features; combining the vector with the two-dimensional code information and a salt value, generating a to-be-verified composite identity hash value through a cryptographic hash function; comparing the hash value with an original hash value pre-stored on a distributed ledger, if the hash values are inconsistent, calculating the similarity between the to-be-verified visual fingerprint and an original visual fingerprint through a twin neural network, and performing auxiliary verification; the application realizes high-security and convenient product identity authentication by strongly binding an external two-dimensional code and internal physical features of a product, and adopts a cascade verification strategy, and effectively prevents counterfeiting.

Systems and methods are described for detecting a simulated phishing message by an email client plug-in. A unique key is received at the email client plug-in. An indication that an email was reported by a user as a suspicious message is received at the email client plug-in. The email is a simulated phishing message having the unique key mapped by cryptographic hashing function into a hash value in a predetermined field in the header of the simulated phishing message. The presence of the predetermined field is detected and the hash value in the predetermined field is compared to a result of applying cryptographic hashing function to the unique key received by the email client plug-in. Responsive to being matched to the result, it is determined that the suspicious message is a simulated phishing message generated by a server.

Embodiments can perform efficient OT (oblivious transfer) protocols to efficiently establish OT correlations that could be used for an MPC protocol. The present embodiments relate to a non-interactive OT (NIOT) protocol using a key encapsulation mechanism (KEM). Two OT protocols are non-interactive OTs, in which a sender generates private, public key pair (pk, sk) that is independent of its input or generated OT correlations. The two OT protocols use a cryptographic hash function and a one-way secure dense key encapsulation mechanism (KEM).

Devices, networks, systems, methods, and procedures for rotating media access control (MAC) addresses of devices. A device can negotiate a periodicity for address rotation of a MAC address associated with the device. The device can receive a data frame and generate seed data based on the data frame. The device can also generate the seed data utilizing a shared secret key, a cryptographic hash function, and / or a cryptographically secure pseudo-random number generator. The device can determine timestamp data based on the periodicity or a time of receipt of the data frame. The device can determine a MAC address based on the timestamp data and the seed data utilizing a pseudo-random function. The device can generate the MAC address after each rotation period. Upon waking from a power saving mode, the device can synchronize with a network device to generate a next MAC address.