PKCS #7 Signature Format
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Files with the .P7S extension contain e-mail messages that have been digitally signed according to the PKCS#7 standard, which stands for the Cryptographic Message Syntax Standard. A digital signature means that the message has been verified in terms of its sender and in terms of whether its content was changed during the transmission, simultaneously ensuring that it can only be read by the right recipient.

A P7S file is most often found when the e-mail software does not support digital signatures – in such cases, the message contains a smime.p7s attachment. Most software, such as Outlook or Thunderbird, does, however, allow the use of digital signatures.

.abw AbiWord Document Format
.ac AC3D Geometry Format
.aim AIMMS ASCII Model Format
.ans ANSI Text File (ANSI Art)
.apt Almost Plain Text Format
.asc ASCII Text Characters Format
.ascii ASCII Text Characters Format
.aty Association Type Placeholder

Last updated

.mmf 04/13/2023
.mup 04/13/2023
.itl 04/13/2023
.scs 04/10/2023
.crypt 04/10/2023
.pnp 04/10/2023
.tap 04/10/2023
.btr 04/03/2023