NATO leaders are considering amending Article 5 of the North Atlantic Treaty to include cyber-attacks. Article 5 says that an armed attack against one or more NATO members should be considered an attack against all of them. NATO leaders also must deal with the issue of who is to blame for an attack, or what’s known as attribution. Not all member states have the same financial resources to elevate their cyber-defenses, and an imbalance could adversely affect the way NATO can defend its member states. The U.S., Britain, Germany and France possess high-end military capability.”]
Source: https://www.bankinfosecurity.com/natos-faces-challenges-in-mounting-cyber-defense-a-7263