A sig file extension is related to the signature files used by various applications.
SIG file extension - Signature
What is sig file? How to open sig files?
File type specification:
The sig file extension is used by many various programs for their signature files.
A signature usually contains some sort of checksum codes or identification data, either about the user or the program, program versions etc.
The default software associated to open sig file:
Company or developer:
Symantec Corporation
Pretty Good Privacy is used to protect and share information online. Pretty Good Privacy was developed to help human rights organizations communicate safely via electronic mail. It was later acquired by Symantec.
List of recommended software applications associated to the .sig 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 sig file, edit sig file, convert sig file, view sig file, play sig file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with sig file - Signature
Click on the software link(s) for more information. Suggested software applications use sig file type for internal purposes and/or also by different way than common edit or open sig file actions.
Microsoft Windows:
Main software associated with sig file by default:
Pretty Good Privacy
Other suggested software:
Panda Antivirus Pro
Spybot - Search & Destroy
VMware Workstation
Print Shop Design Suite
Print Shop
Perception