{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8521821","patent":{"patent_number":"US-8521821","title":"Encrypted email based upon trusted overlays","assignee":null,"inventors":[],"filing_date":"2009-03-17T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["H04L","H04L","H04L","H04L","H04L","H04L","H04L"],"num_claims":12,"abstract":"Sending and receiving encrypted emails. At a web browser, user input is received requesting a compose email page user interface for a web-based email system. The compose email page user interface is requested from a server for the web-based mail system. Web page code is received from the server for the compose email page user interface. The web page code for the compose email page user interface is parsed to determine screen locations of one or more user input interface elements. The compose email page user interface is rendered in the browser. One or more browser-based interface elements implemented integral to the browser are overlaid onto the compose email page user interface. User input is received in the browser user interface elements. The user input received is encrypted. The encrypted user input is transferred into one or more elements of the compose email page user interface."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Encrypted email based upon trusted overlays","description":"Sending and receiving encrypted emails. At a web browser, user input is received requesting a compose email page user interface for a web-based email system. The compose email page user interface is r","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8521821","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-8521821","citation_suggestion":"Patentable. \"Encrypted email based upon trusted overlays\" (US-8521821). https://patentable.app/patents/US-8521821","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8521821","json":"https://patentable.app/api/llm-context/US-8521821","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T13:15:30.708Z"}