diff --git a/FAQ.md b/FAQ.md
new file mode 100644
index 0000000..d086e59
--- /dev/null
+++ b/FAQ.md
@@ -0,0 +1,19 @@
+## I get the error "There is no suitable CSPRNG installed on your system"
+
+This error means you do not have a secure cryptographic random number generator installed on your system. This is however required by PrivateBin for security reasons.
+Have a look at the [requirements list](https://github.com/PrivateBin/PrivateBin/wiki/Installation#requirements) to see what you are missing.
+
+If you think you have at least one secure PRNG installed you can use the following test script to check which secure PRNG you actually support:
+```php
+echo '<pre>PHP version used: ', PHP_VERSION, PHP_EOL,
+    'extension libsodium is loaded: ',
+    (extension_loaded('libsodium') ? 'true' : 'false'), PHP_EOL,
+    '/dev/urandom exists and is readable: ',
+    (is_readable('/dev/urandom') ? 'true' : 'false'), PHP_EOL,
+    'extension mcrypt is loaded: ',
+    (extension_loaded('mcrypt') ? 'true' : 'false'), PHP_EOL,
+    'function mcrypt_create_iv exists: ',
+    (function_exists('mcrypt_create_iv') ? 'true' : 'false'), PHP_EOL,
+    'extension com_dotnet is loaded: ',
+    (extension_loaded('com_dotnet') ? 'true' : 'false'), '</pre>';
+```
\ No newline at end of file