{"date_created":"2020-08-27T11:24:44Z","oa_version":"Published Version","main_file_link":[{"url":"https://patents.google.com/patent/WO2019158209A1","open_access":"1"}],"abstract":[{"lang":"eng","text":"The present invention concerns a computer-implemented method for secure data exchange between a sender (A) and a recipient (B), wherein the method is performed by the sender (A) and comprises encrypting data using a symmetric key k, creating a write transaction T W , wherein the write transaction T W comprises information usable to derive the symmetric key k and an access policy identifying the recipient (B) as being allowed to decrypt the encrypted data, providing the recipient (B) access to the encrypted data, and sending the write transaction T W to a first group of servers (AC) for being stored in a blockchain data structure maintained by the first group of servers (AC)."}],"status":"public","ipc":"G06F21/62 ; H04L9/08 ; H04L9/32","type":"patent","oa":1,"extern":"1","title":"Methods and systems for secure data exchange","date_updated":"2022-01-05T14:00:32Z","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","_id":"8313","citation":{"ieee":"B. Ford, L. Gasser, E. Kokoris Kogias, and P. Janovic, “Methods and systems for secure data exchange.” 2019.","short":"B. Ford, L. Gasser, E. Kokoris Kogias, P. Janovic, (2019).","chicago":"Ford, Bryan, Linus Gasser, Eleftherios Kokoris Kogias, and Philipp Janovic. “Methods and Systems for Secure Data Exchange,” 2019.","ista":"Ford B, Gasser L, Kokoris Kogias E, Janovic P. 2019. Methods and systems for secure data exchange.","ama":"Ford B, Gasser L, Kokoris Kogias E, Janovic P. Methods and systems for secure data exchange. 2019.","mla":"Ford, Bryan, et al. <i>Methods and Systems for Secure Data Exchange</i>. 2019.","apa":"Ford, B., Gasser, L., Kokoris Kogias, E., &#38; Janovic, P. (2019). Methods and systems for secure data exchange."},"date_published":"2019-08-22T00:00:00Z","day":"22","applicant":["École Polytechnique Fédérale De Lausanne "],"year":"2019","publication_date":"2019-08-22","author":[{"first_name":"Bryan","last_name":"Ford","full_name":"Ford, Bryan"},{"full_name":"Gasser, Linus","last_name":"Gasser","first_name":"Linus"},{"full_name":"Kokoris Kogias, Eleftherios","first_name":"Eleftherios","last_name":"Kokoris Kogias","id":"f5983044-d7ef-11ea-ac6d-fd1430a26d30"},{"full_name":"Janovic, Philipp","first_name":"Philipp","last_name":"Janovic"}],"article_processing_charge":"No","ipn":"WO2019158209 (A1)","month":"08"}