Abstract
The key space, a crucial metric in discerning the strength of PUFs, holds significant importance for their security. However, there is insufficient research on superlattice PUFs. This paper integrates superlattice into the PUF theory framework, exploring its physical mechanisms and properties. The focus is on estimating the key space of superlattice PUFs and conducting a security analysis, encompassing resistance to brute force cracking, birthday attacks, and cloning attacks. The results show that its key space can be up to 24,500×50, with a huge number of Challenge-Response Pairs (CRP) set, belonging to strong PUF. It has significant advantages over conventional PUFs, making it applicable in the domains of cryptography and information security.
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