The Technical Research And System Implementation Of The Superlattice Key Distribution

Information security is the fundamental guarantee for modern social activities.Cryptography plays an indispensable role as the core technology to offer the main means to guarantee information security.The basic principle of modern cryptography is that the security of the entire cryptosystem is determined by the confidentiality of the key.However,key management is usually the most vulnerable part of the cryptosystem,especially the key generation and distribution,which are often the bottleneck problems that limit the security and benefits of the cryptosystem.Physical Unclonable Function(PUF)is one of the most practically emerging hardware security technologies with interesting physical security characteristics.The key is embedded in the physical structure of the hardware entity,which brings brand new solutions for key management issues including key generation,key storage,and key distribution.This thesis focuses on the topic of the key management application based on superlattice PUF and introduces the research productions during my doctoral program,mainly including the study of superlattice PUF model,the key security analysis of the superlattice PUF,and technology research and system implementation of the superlattice key distribution(SSL-SKD).Specifically,we introduce the physical phenomena found in the GaAs/Al0.45Ga0.55As weakly coupled lightly doped semiconductor superlattice,thus experimentally study the corresponding physical mechanisms with the research perspective under the theoretical frame of PUF.According to the intrinsic physical security mechanism found in superlattice PUF,the cryptographic characteristics analysis model and cryptographic engineering application model of superlattice PUF are established.Furthermore,a key distribution scheme based on superlattice PUF pairs is researched and verified.The main contributions and innovations of this thesis are summarized as follows:(1)Absorbing superlattice into the PUF zoo.On the one hand,PUF provides a theoretical framework and analytical model for the properties of superlattice such as physical unclonability and mathematical unclonability.On the other hand,the study of the unique cryptographic characteristics of superlattices requires expansion of PUF cryptographic theory.The research on a series of new phenomena and new problems of superlattice devices,such as transient chaos phenomenon,physical function phenomenon,physical unclonable phenomenon,physical unclonable twin phenomenon,which derive new cryptographic forms and new application modes,such as random number generation and key distribution technology based on superlattice.(2)Proposing analysis model and evaluation methods for superlattice devices to lays a theoretical foundation for application security of superlattice PUF.The qualitative relationship between the microstructure parameters and the macroscopic characteristics of the superlattice devices is studied under the MBE growth kinetic theory,which reveals the source of physical unclonable and device twinning of the superlattice.We analyze the difference amplification effect of superlattice function from transient chaotic effect under nonlinear dynamics theory.This reveals the cryptographic characteristics from the dynamic behavior and the process mechanism intrinsic in superlattice devices.In addition,we introduce the cryptographic characteristics detection and entropy estimation methods to analyze the black-box model of superlattice devices,thus quantitatively evaluate the PUF characteristics and security measures of superlattice devices.(3)Designing the protocol and technical scheme of SSL-SKD to experimental demonstrate the self-certified high-speed long-haul key distribution with unconditional security.The physical unclonable superlattice PUF pairs are used as the key generation,storage,and transmission carrier to realize key distribution.In this thesis,a security protocol is designed and technology including high-precision sequence synchronization,fuzzy extraction,security analysis,and system design is developed.The superlattice PUF pairs are security anchor for the SSL-SKD system,which can be deployed on the public network.In the experimental environment,the SSL-SKD system successfully realized the key generation and key reconstruction with a key distribution rate reaching 17 Mbit/s.The randomness of the secure key passes the NIST statistical test suite.SSL-SKD technology is a basic information security technology.After years of research and development,this work gradually reaching the maturity of application adaptation verification,it is expected to bring a new practical solution to the key management problem.