The File Extensions Database

.CRYPTRA File Extension

  • Developer by: BMB Software
  • Category: Encoded Files
  • Format: Binary

What is an .CRYPTRA file?

.CRYPTRA is Cryptra Encrypted File

Encrypted file created by Cryptra, a program used for securing data sent via email; contains a file that was encrypted using one of many available One Time Pad (OTP) keys provided on a CD (or .ISO image) with the software.

CRYPTRA files are used for sending files securely as email attachments. Once received, they must be decrypted using both the Cryptra software and the OTP CD that was used to encrypt the files. Therefore, in order to successfully encrypt and decrypt a CRYPTRA file, both the sender and receiver must have the Cryptra software installed and a copy of the exact same OTP CD that was used for the encryption.

Each OTP CD provided with Cryptra includes the capability to encode up to 9,600 files, each of up to 64KB in size. Larger files can be encrypted using multiple keys together. Since OTP codes should only be used once, BMB Software provides a service to give users additional OTP CDs.

Programs that open Cryptra Encrypted File
BMB Software Cryptra

How to solve problems with CRYPTRA files

  • Associate the CRYPTRA file extension with the correct application. On :
    Windows: Right click on any CRYPTRA file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.CRYPTRA files". Mac: Right click (or Ctrl-click) the CRYPTRA file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .CRYPTRA is Cryptra Encrypted File. Because only the current version supports the latest CRYPTRA file format. Search, therefore, e.g. on the BMB Software manufacturer website after an available .CRYPTRA is Cryptra Encrypted File update.
  • To make sure that your CRYPTRA file is not corrupted or virus-infected, get the file again and scan it with antivirus software.