Northern Arizona University

USA As Represented by Secretary of the Navy

Donald A Telesca

Bertrand Francis Cambou

H Shelton Jacinto

Ian Burke

Julie B Heynssens

Brit Riggs

Manuel Aguilar Rios

Jack Garrard

Methods and systems for managing access to encrypted digital files are proposed. A remote or client device including an array of physical unclonable function (PUF) devices is provided. A server device has an image of the PUF, with previously measured responses. The server device randomly selects a set of responses from a first list PUF devices in its image. The server device then generates masking data to select among the first list to generate response bitstream. The response bitstream is used to encrypt a file, which sent to the client for storage. The random number is also sent. Later, the server generates an encrypted message digest from which the client can retrieve the masking data, which is used with the random number to generate a response bitstream from the client PUF to decrypt the file.

Individual digital access with ternary states and one-way unclonable functions to protect digital files

Systems and methods for the generation and use of session keys supporting secure communications between a client and server device are disclosed. The client hashes each of a series of passwords a first number of times. The hashed passwords are sent to a server. The server applies the hashed password to an array of PUF devices, and receives an initial response bitstream which is stored. The client later hashes each of the series of passwords a second number of times, which is less than the first number, and these are 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. For each password, the number of hashes necessary to achieve a match is a partial session key. Latency is improved by an array of separately addressable PUFs, each producing a partial session key.

Associative PUF arrays to generate session keys with pseudo-homomorphic methods

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.

PUF-protected pseudo-homomorphic methods to generate session keys

Growing community of inventors

Rome, NY, United States of America

Donald A Telesca