[{"draft":"","doc_id":"RFC0644","title":" On the problem of signature authentication for network mail ","authors":["R. Thomas"],"format":["ASCII","HTML"],"page_count":"3","pub_status":"UNKNOWN","status":"UNKNOWN","source":"Legacy","abstract":"  ","pub_date":"July 1974","keywords":["  "],"obsoletes":[""],"obsoleted_by":[""],"updates":[""],"updated_by":[""],"see_also":[""],"doi":"10.17487\/RFC0644","errata_url":null}]