FileInfo.com


.EFR File Extension


File Type Encryptafile Private Key File
File Format File
Common? No
File Description Private Key used to authenticate an encrypted Encryptafile (.EFL) file; contains a hexadecimal representation of the private key used to created the digital signature for the file.

The length of a private key file must be greater than or equal to 16 bits, and less than or equal to 7128 bits.
Program(s) that open efr files Windows: XenoSystems Encryptafile

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/efr