Abstract: A method and system for digital document security with embedded Quick Response (QR) codes. A Quick Response (QR) code with a digital picture is embedded in a digital document creating a secure digital document. The secure digital document with the embedded QR code helps to prevent tampering of the secure digital document. Upon scanning the QR code in the secure digital document, the contents of the digital document and the contents of digital picture are verified confirming the authenticity, integrity, non-repudiation and non-tampering of the contents of the digital picture and the secure digital document.

Abstract: A method and system for storing and retrieving electronic files using blockchains. Original electronic files including plaintext and encrypted files, are split into plural smaller files, encrypted, have a file index created and stored in a blockchain. The encrypted plural smaller files are sent to one or more email servers with standard emailing protocols (e.g., IMAP/POP/SMTP, etc.) and stored in one or more email inboxes. Email inboxes provide secure, private storage of electronic information. The encrypted plural smaller files are retrieved from the one or more e-mail servers using the file index stored on the blockchain, decrypted and reassembled back into the original electronic file.

Abstract: A method and system for creating and storing digital certificates from online meetings using blockchains. The method and system creates, store and retrieve digital certificate information for online meetings with hashing and blockchains. The created plural digital certificates are secure, tamper proof, sharable on social media, loadable on electronic devices, storable in digital wallets, revocable and can also have an expiration date and time.

Abstract: A method and system for storing and retrieving electronic files using blockchains. Original electronic files including plaintext and encrypted files, are split into plural smaller files, encrypted, have a file index created and stored in a blockchain. The encrypted plural smaller files are sent to one or more email servers with standard emailing protocols (e.g., IMAP/POP/SMTP, etc.) and stored in one or more email inboxes. Email inboxes provide secure, private storage of electronic information. The encrypted plural smaller files are retrieved from the one or more e-mail servers using the file index stored on the blockchain, decrypted and reassembled back into the original electronic file.