diff --git a/reference/openssl/functions/openssl-private-decrypt.xml b/reference/openssl/functions/openssl-private-decrypt.xml
index 29e43693ad..0e00626148 100644
--- a/reference/openssl/functions/openssl-private-decrypt.xml
+++ b/reference/openssl/functions/openssl-private-decrypt.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
 <!-- splitted from ./en/functions/openssl.xml, last change in rev 1.19 -->
   <refentry id="function.openssl-private-decrypt">
    <refnamediv>
@@ -29,6 +29,14 @@
     <para>
      &return.success;
     </para>
+    <para>
+     You can use this function e.g. to decrypt data which were supposed only to
+     you.
+    </para>
+    <para>
+     See also <function>openssl_public_encrypt</function> and
+     <function>openssl_public_decrypt</function>.
+    </para>
    </refsect1>
   </refentry>
 
diff --git a/reference/openssl/functions/openssl-private-encrypt.xml b/reference/openssl/functions/openssl-private-encrypt.xml
index 8208ff54b1..f3a184c394 100644
--- a/reference/openssl/functions/openssl-private-encrypt.xml
+++ b/reference/openssl/functions/openssl-private-encrypt.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
 <!-- splitted from ./en/functions/openssl.xml, last change in rev 1.19 -->
   <refentry id="function.openssl-private-encrypt">
    <refnamediv>
@@ -26,6 +26,14 @@
     <para>
      &return.success;
     </para>
+    <para>
+     This function can be used e.g. to sign data (or its hash) to prove that it
+     is not written by someone else.
+    </para>
+    <para>
+     See also <function>openssl_public_decrypt</function> and
+     <function>openssl_public_encrypt</function>.
+    </para>
    </refsect1>
   </refentry>
 
diff --git a/reference/openssl/functions/openssl-public-decrypt.xml b/reference/openssl/functions/openssl-public-decrypt.xml
index 69693d4c6a..8213e772e6 100644
--- a/reference/openssl/functions/openssl-public-decrypt.xml
+++ b/reference/openssl/functions/openssl-public-decrypt.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
 <!-- splitted from ./en/functions/openssl.xml, last change in rev 1.19 -->
   <refentry id="function.openssl-public-decrypt">
    <refnamediv>
@@ -28,6 +28,14 @@
     <para>
      &return.success;
     </para>
+    <para>
+     You can use this function e.g. to check if the message was written by the
+     owner of the private key.
+    </para>
+    <para>
+     See also <function>openssl_private_encrypt</function> and
+     <function>openssl_private_decrypt</function>.
+    </para>
    </refsect1>
   </refentry>
 
diff --git a/reference/openssl/functions/openssl-public-encrypt.xml b/reference/openssl/functions/openssl-public-encrypt.xml
index c1812b4794..689b11215e 100644
--- a/reference/openssl/functions/openssl-public-encrypt.xml
+++ b/reference/openssl/functions/openssl-public-encrypt.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.4 $ -->
+<!-- $Revision: 1.5 $ -->
 <!-- splitted from ./en/functions/openssl.xml, last change in rev 1.19 -->
   <refentry id="function.openssl-public-encrypt">
    <refnamediv>
@@ -28,6 +28,15 @@
     <para>
      &return.success;
     </para>
+    <para>
+     This function can be used e.g. to encrypt message which can be then read
+     only by owner of the private key. It can be also used to store secure data
+     in database.
+    </para>
+    <para>
+     See also <function>openssl_private_decrypt</function> and
+     <function>openssl_private_encrypt</function>.
+    </para>
    </refsect1>
   </refentry>