{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11468435","patent":{"patent_number":"US-11468435","title":"Apparatus and methods of air-gapped crypto storage using diodes","assignee":null,"inventors":[],"filing_date":"2020-04-23T00:00:00.000Z","publication_date":"2022-10-11T00:00:00.000Z","cpc_codes":["G06Q","G06F","G06N","G06N","G06Q","G06Q","G06Q","G06Q","H04L","H04L","H04L","H04L","H04L","H04L","H04L","G06Q","G06Q","H04L","H04L","H04L","H04L","H04L"],"num_claims":36,"abstract":"In a blockchain network, a “cold wallet” allows users to securely create and store their private key and sign their transaction data only when the wallet is completely offline. When a user requests a transaction, a user key tag that identifies the user's key is determined. The transaction data and the user's key tag are transmitted to a cold wallet that includes an HSM Trusted Client and an HSM over a first one-way communication channel during a window in a first sequence of connection windows. Inside the cold wallet, the HSM Trusted Client uses the user key tag to determine an encrypted version of the user's signing key. During a processing window, the transaction data and encrypted signing key are transmitted to the HSM, where a cleartext key is recovered and used to sign the transaction, and the signed transaction is transmitted back to the HSM Trusted Client. During a second connection window, the signed transaction is transmitted from the HSM Trusted Client for transmission to the blockchain network. The processing and connection windows do not overlap. The one-way communication paths combined with the non-overlapping connection and processing prevent unauthorized access to the signing keys."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Apparatus and methods of air-gapped crypto storage using diodes","description":"In a blockchain network, a “cold wallet” allows users to securely create and store their private key and sign their transaction data only when the wallet is completely offline. When a user requests a ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11468435","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11468435","citation_suggestion":"Patentable. \"Apparatus and methods of air-gapped crypto storage using diodes\" (US-11468435). https://patentable.app/patents/US-11468435","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11468435","json":"https://patentable.app/api/llm-context/US-11468435","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T12:41:52.445Z"}