keyringer software package provides 0.3.7-1, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install keyringer
keyringer is installed in your system.
Make ensure the keyringer package were installed using the commands given below,
$ sudo dpkg-query -l | grep keyringer *
You will get with keyringer package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Miscellaneous |
| Package | keyringer |
| Version | 0.3.7-1 |
| Description | 0.3.7-1 |
| Sub Section | Misc |