Open File Extension P7M
File extension P7M is used to denote a digitally signed and encrypted E-Mail. Both the E-Mail message itself and any attachments are added to the P7M envelope, which can only be opened by clients with the appropriate key.
P7M files are an implementation of the Secure/Multipurpose Internet Mail Extension (S/MIME) standard which supports public key encryption. S/MIME provides essentially two cryptographic services which can be used by E-Mail applications. The first is digital signatures, which can be used to authenticate a message, check its integrity and prove its origin or source. The second is encryption, which is used to ensure that data remains both private and secure, even if an E-Mail is intercepted by a third-party.
As P7M files are encrypted, it is not possible to extract the contents without the appropriate software and decryption key. E-Mail applications with S/MIME support can be configured to automatically retrieve the necessary key to decrypt received P7M files and display the resultant message as an ordinary E-Mail. However, clients without support, such as web-based E-Mail services, will simply show the encrypted P7M E-Mail as an attachment.
Encryption is utilised by P7M files to ensure data privacy even if the E-Mail was accidentally sent to the wrong address or was intercepted during transmission. However, this has the disadvantage that anti-virus software is unable to detect malware, as it will not be able to decrypt the E-Mail once it has been created. Therefore, any attachments received in a P7M file should be checked prior to opening, even if they are from a known and trusted source.
P7M files can be opened in any E-Mail client that supports S/MIME provided that the necessary public key is available. P7M files can also be opened using other applications such as Cryptigo p7mViewer, which is designed specifically for opening signed and encrypted E-Mails.
For more general information about files, file extensions and registry you can read one of the following articles:
- Windows registry - Windows registry is included in modern Windows operating systems to replace the older INI files which also contained system configuration. Let's concentrate on the structure and purpose of Windows System Registry and show some concerns that makes it vulnerable to attacks...
- Folders, files and paths - Files are the entries or information stored on your computer. These are represented by binary coding and written on the tracks on a disk. Files are often represented by distinct icons, a normal practice done by Microsoft with their products including system files for their series of operating systems...
- What are file extensions? - File extensions are unnoticed yet are very crucial parts of the computer world. But many are still unaware of the basic foundation and principles behind the remarkable wonders of computers...
Download PCUltraSpeed, an award winning application and keep your PC running error-free and at optimal performance.