S/MIME Secure/Multipurpose Internet Mail data
File type: Email related data file
A p10 file extension is related to the S/MIME Secure/Multipurpose Internet Mail files.
Found 2 different file type records with the same p10 filename suffix.
File type category:
Email related data file
Date updated: December 30, 2024
The p10 file extension is related to secured e-mail messages.
S/MIME (Secure/Multipurpose Internet Mail Extensions) provides a consistent way to send and receive secure MIME data. Based on the popular Internet MIME standard, S/MIME provides the following cryptographic security services for electronic messaging applications: authentication, message integrity and non-repudiation of origin (using digital signatures) and privacy and data security (using encryption).
S/MIME can be used by traditional mail user agents (MUAs) to add cryptographic security services to mail that is sent, and to interpret cryptographic security services in mail that is received. However, S/MIME is not restricted to mail; it can be used with any transport mechanism that transports MIME data, such as HTTP. As such, S/MIME takes advantage of the object-based features of MIME and allows secure messages to be exchanged in mixed-transport systems.
Further, S/MIME can be used in automated message transfer agents that use cryptographic security services that do not require any human intervention, such as the signing of software-generated documents and the encryption of FAX messages sent over the Internet.
A typical application which allows a user to generate cryptographic information has to submit that information to a certification authority, who transforms it into a certificate. PKCS #10 describes a syntax for certification requests. The application/pkcs10 body type MUST be used to transfer a PKCS #10 certification request.
MIME types:
application/pkcs10
Software applications that handle other tasks involving p10 files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
File type category:
Archive and compressed file
Date updated: September 24, 2026
Parchive recovery volumes provide error correction for file collections that may be damaged or incomplete. A .p10 file stores recovery information rather than serving as an ordinary archive of the original files.
QuickPar, a Microsoft Windows utility by Peter Clements, uses PAR recovery files to verify the files in a set and reconstruct missing or damaged data when enough recovery information is available. The .p10 file normally works together with the set's other PAR files and the original data files.
The numbered .p10 naming belongs to the older PAR recovery-file convention. Newer recovery sets commonly use PAR2 files with different naming, although compatible software may still encounter and process older numbered PAR volumes.
On Microsoft Windows, open the matching PAR index file in QuickPar rather than treating the .p10 file as a standalone archive. Keep the .p10 file together with the other recovery files and the data files from the same set.
QuickPar can use the recovery volume to verify the set and, when sufficient recovery data is present, repair missing or damaged files.
A .p10 recovery volume is not intended for conversion into a normal archive or document format. Its parity data is meaningful only as part of its associated PAR recovery set.
To create a new recovery set, use the original files with compatible Parchive software. This creates new recovery volumes; simply renaming the .p10 file does not convert it.
Software applications that handle other tasks involving p10 files:
Microsoft Windows
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