Name : Anders Hansson Email : anders.hansson&securedemail.org MIME media type name : Application MIME subtype name : Vendor Tree - vnd.sema Required parameters : None Optional parameters : None Encoding considerations : binary This media type may require encoding on transports not capable of handling binary. Security considerations : Files of subtype "sema" contain no executable code, and do not pose any known security risks. Furthermore, the data within is encrypted with 256 bit keys only known to the intended data owner. Interoperability considerations : Currently the subtype "sema" has parser support on Windows Platforms (98, ME, NT, 2000 and XP) - however other platforms are to be covered in the future. Published specification : There is currently no RFC available for the media-type "application/vnd.sema". Applications which use this media : Clients of Secured eMail (www.securedemail.org). Currently, clients are Microsoft Office 2000, XP (w/o content) and 2003. Groupwise and Outlook Express are planned. Additional information : 1. Magic number(s) : varies depending on object type and version 2. File extension(s) : .sema 3. Macintosh file type code : none, missing 4. Object Identifiers: none, missing Sema derives its name from "Secured EMail Archive". A cornerstone in the concept of secured emailing is that the intended recipient of a email gets the email intact. This is why it is important that the "sema" subtype is recognized as a MIME media type. Person to contact for further information : 1. Name : Peter Davin 2. Email : peter.davin&securedemail.org Intended usage : Common The subtype "sema" is ment to be a extension to the world of secured email communication, and act as a archive container for encrypted data in general. It is a encrypted binary package that can be locked with multiple keys - both symetric and PKI style. Since its format is planned to be referenced at a later date, the intended usage is common. Author/Change controller : Contact Author Anders Hansson, CTO Secured eMail, anders.hansson&securedemail.org regarding issues of technical nature. (created 08 September 2005) []