Invalidity dossier
US 9948460
Multivariate cryptography based on clipped hopfield neural network
Current assignee: City University of Hong Kong
Added 9/23/2026, 10:11:01 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
US 9,948,460 B2 — Patent Overview
Title: Multivariate cryptography based on clipped Hopfield neural network
Patent number: US 9,948,460 B2 (application US 14/839,528; pre-grant publication US 2017/0063541 A1)
Inventors: Lee Ming Cheng; Jia Wang
Assignee: City University of Hong Kong
Key dates (per the source listing): priority/filing 2015-08-28; publication 2018-04-17; adjusted expiration 2036-06-08; legal status listed as active.
Purpose: The disclosure "generally relates to a multivariate public key cryptosystem that uses an extended Clipped Hopfield neural networks and related embodiments." The background notes that RSA and ECC rest on the presumed difficulty of integer factorization and discrete logarithm respectively, that neither has a proof of NP-completeness or NP-hardness, and that quantum computers pose a new challenge to classical cryptosystems—framing the motivation for an alternative, multivariate approach.
Plain-language scope: The patent describes a cryptosystem built from an extended Clipped Hopfield neural network, with figures showing a neuron model (FIG. 1), cryptosystem flows (FIGS. 2A–2B), sensitivity to plaintext and key (FIGS. 3–6), and method flow diagrams (FIGS. 7–8). Computing-environment figures (FIGS. 9–10) depict an environment operable to execute the disclosed architecture. The text describes synchronized parties, base matrices, matrix pairs, and a threshold vector (per the listed prior-art keywords), and classification includes key agreement, key generation via random numbers or seeds, secret sharing/threshold schemes, and quantum cryptography. The classification listing is metadata, not a statement of claimed coverage.
Source: https://patents.google.com/patent/US9948460/en
What the excerpt does not establish: The full claim set, the precise algorithm or equations, the exact role of the noted matrices and threshold vector, any experimental security results, and whether the listed legal status or adjusted expiration reflects a formal legal determination (the source itself labels these as assumptions, not legal conclusions). This overview is based solely on the supplied excerpt.
Generated 10/1/2026, 9:33:43 PM
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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