crypto-dm-modules-8.3-1-486-di software package provides devicemapper crypto module, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install crypto-dm-modules-8.3-1-486-di
crypto-dm-modules-8.3-1-486-di is installed in your system.
Make ensure the crypto-dm-modules-8.3-1-486-di package were installed using the commands given below,
$ sudo dpkg-query -l | grep crypto-dm-modules-8.3-1-486-di*
You will get with crypto-dm-modules-8.3-1-486-di package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | debian-installer udeb packages |
| Package | crypto-dm-modules-8.3-1-486-di |
| Version | 8.3-6+deb7u1 |
| Description | devicemapper crypto module |
| Sub Section | Debian-installer |