Systems and methods for the generation and use of session keys supporting secure communications between a client and server device are disclosed. The client device has or receives a password, which it hashes a predetermined first number of times. The hashed password is sent as a message digest to a server. The server applies the hashed password to a an array of PUF devices, and receives a response bitstream which is stored. The client later hashes the password a second predetermined number of times, which is less than the first predetermined number, and this second message digest is sent to the server. The server continues to hash the second message digest, generate PUF responses, and compare the result to the initially stored responses. The number of hashes necessary to achieve a match is the session key.

A system for using hardware-secured receptacle devices includes a transfer processing device configured to store transfer method data associated with user on at least a cryptographically secured receptacle device, receive user authentication credentials from a user, authenticate user identity as a function of the user authentication credentials, retrieve a transfer authorization from the at least a cryptographically secured receptacle device as a function of the transfer method data, generate a transfer as a function of the transfer authorization.

A method of writing data to a memory device and reading data from the memory device includes issuing a challenge to a PUF device during a power-up process in order to derive a PUF response, error correcting the PUF response, providing delinearized addresses via a delinearization algorithm to the memory device using the error corrected PUF response, masking data, which is written to the memory device, via a masking module using the error corrected PUF response, de-masking data, which is read from the memory device, via the masking module (19) using the error corrected PUF response; and performing a check-sum verification of read data such that address delinearization and data masking are used together to obfuscate the memory content.

A device and a method for implementing a physically unclonable function is disclosed. In one aspect, the device includes at least one electronic structure including a dielectric. A conductive path is formed at a random position through the dielectric due to an electrical breakdown of the dielectric, or the electronic structure is adapted for generating an electrical breakdown of the dielectric such that the conductive path is formed through the dielectric at a random position. The at least one electronic structure is adapted for determining a distinct value of a set comprising at least two predetermined values. The distinct value is determined by the position of the conductive path through the dielectric.

In example implementations, a method is provided. The method includes printing a three-dimensional (3D) object that includes a secondary structure. The secondary structure is removed. A representation of a surface of the 3D object where the secondary structure was removed is captured. The 3D object is authenticated based on the representation of the surface.

A diamond asset comprising one or more diamonds and an encryption chip is used to asset-back a cryptographic token that can be used to conduct transactions. The cryptographic token is written to a blockchain using a smart contract that is configured to enable a transaction associated with the token in response to two or more of: a signature by the encryption chip, a signature by the owner of the diamond asset, and a validation of a visual layout of the diamond asset.

Tracking, identifying and article management systems and methods for reliably and repeatedly determining one or more physically uncopiable attribute instances (of the same or varying types) from or inherent in an article of manufacture, using the selected physical uncopiable attribute(s) to produce an unforgeable identity for the article, and then integrating that unforgeable identity into computer-based tracking systems in a way that permits the tracking system to track and monitor articles for which identity information is known. Applications include documents, fashion accessories, artwork, and other objects.

Stochastic or near-stochastic physical characteristics of resistive switching devices are utilized for generating data distinct to those resistive switching devices. The distinct data can be utilized for applications related to electronic identification. As one example, data generated from physical characteristics of resistive switching devices on a semiconductor chip can be utilized to form a distinct identifier sequence for that semiconductor chip, utilized for verification applications for communications with the semiconductor chip or utilized for generating cryptographic keys or the like for cryptographic applications.

Unclonable function circuitry includes a plurality of pairs of phase-change memory cells in a virgin state, and sensing circuitry coupled to the plurality of pairs of phase-change memory cells in the virgin state. The sensing circuitry identifies a subset of the plurality of pairs of phase-change memory cells in the virgin state based on a reliability mask. Signs of differences of effective resistance values of the identified subset of the plurality of pairs of phase-change memory cells in the virgin state are sensed by the sensing circuitry. The sensing circuitry generates a string of bits based on the sensed signs of differences in the effective resistance values of the identified subset of the plurality of pairs of phase-change memory cells in the virgin state. Processing circuitry coupled to the unclonable function circuitry, in operation, executes one or more operations using the generated string of bits.

Devices, systems and methods for improving reliability and security of a memory system are described. An example method includes receiving a seed value and a data stream, generating, based on the seed and using a physical unclonable function (PUF) generator, a PUF data pattern, generating, based on the seed, a pseudo-random data pattern, performing a first logic operation on the PUF data pattern and the data stream to generate a result of the first logic operation as a first data sequence, and performing a second logic operation on the pseudo-random data pattern and a second data sequence that is based on the first data sequence to generate a result of the second logic operation as a third data sequence for storage on the memory system, wherein the PUF generator is selected at least in-part based on one or more physical characteristics of the memory system.