A p7a file extension is associated with the PKCS #7 signature data.
Software that open p7a file
P7A file extension - PKCS #7 signature
What is p7a file? How to open p7a files?
File type specification:
The p7a file extension is related to the PKCS #7 signature data.
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).
Mime types:
application/x-pkcs7-signature
The default software associated to open p7a file:
OpenSSL is toolkit used for implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols.
List of recommended software applications associated to the .p7a file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open p7a file, edit p7a file, convert p7a file, view p7a file, play p7a file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with p7a file - PKCS #7 signature
Click on the software link for more information about OpenSSL. OpenSSL uses p7a file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).