Update shell-and-data-access.md

docs.it4i/general/shell-and-data-access.md

@@ -7,11 +7,8 @@ All IT4Innovations clusters are accessed by the SSH protocol via login nodes at
 !!! note "Workgroups Access Limitation"
     Projects from the **EUROHPC** workgroup can only access the **Karolina** cluster.
 
-!!! important "Karolina and Barbora updated security requirements"
-    Due to updated security requirements on Karolina and Barbora,
-    only clients based on OpenSSH 7.4p1 and later can connect (including other SSH clients with compatible security algorithms).
-    This means that starting with RHEL/Centos 7, Debian 9 or Ubuntu 18.04, you are good to go.
-    Some users who still have DSA keys will be also unable to connect and are urged to update their keypairs, preferably to the Ed25519 format.
+!!! important "Supported keys"
+    We accept only RSA or ED25519 keys for logging into our systems.
 
 ### Karolina Cluster