Opening CMS files

Have a problem opening a .CMS file? We collect information about file formats and can explain what CMS files are. Additionally we recommend software suitable for opening or converting such files.

What is the .CMS file type?

The primary role of the .cms filename extension binds it with the Cryptographic Message Syntax (CMS) Signature (.cms) file type. CMS is an international standard adopted by the IETF (Internet Engineering Task Force) for cryptographic encryption and signature to provide protection, authentication, and verification of digital data.

Apart from being embedded, CMS signatures can be saved into separate files and called detached. A detached CMS signature is a small file (.cms or other such as .p7s or .signature), usually with the same filename as the data file, that contains a standard unique cryptographic hash generated against data in the signed file. To perform its function, a detached CMS signature must be distributed together with the signed file.

A range of signature readers can be used to verify documents and their contents by their digital signatures (.cms, etc.). Such tools often 'grab' the .cms file type by associating themselves with it.

Alternatively, the .cms extension represents the Desmond Composite Model System (CMS) format and the respective file type. CMS is natively used in the Desmond and Maestro (Schrödinger, LLC) molecular dynamics software. The .cms file is a Desmond model. It is a large ASCII file in which a precise description of a complex molecular structure is given. Desmond CMS files can be compressed, in which case they receive the .cms.gz (or .cmsgz) filename suffix. Such Desmond models can be imported in or used with other scientific software as well as converted into other molecular model formats such as GROMACS (.gro).

The .cms extension also stands for the Compound Media Storage (CMS) file type and format used by the TrialDirector court trial presentation software from inData Corp. Devised for storing transcribed video recordings of depositions, witness testimonies, and so on, CMS is a proprietary format accommodating both multimedia data and text in a synchronized fashion. The .cms file is a synchronized Digital Video Transcript (DVT) made with inData's TimeCoder or by a service bureau. Such transcripts (.cms) can be imported in TrialDirector or other trial presentation software.

With reference to Internet Explorer (IE), a proprietary web browser from Microsoft, and its Internet Explorer Administration Kit (IEAK), the .cms extension is linked up with the IEAK Service Provider (.cms) file type. Generated by the Connection Manager Administration Kit (CMAK), such .cms files define service profiles for the connection manager in IE.

As an acronym for Content Management System (CMS), the .cms extension is sometimes used on CMS-driven websites to denote individual web pages in the URL displayed in a browser's address field. This is a virtual suffix processed by the internal workings of a CMS that uses it. Dynamic web pages are normally denoted with .php, .aspx, .htm(l), or no extension at all.

Software to open or convert CMS files

You can open CMS files with the following programs:
ChessBase by ChessBase
SecCommerce SecSigner
SecCommerce SecSigner by SecCommerce Informationssysteme GmbH
P7S Viewer
P7S Viewer by Secure Soft
honestech Claymation Studio

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