Europe is searching for ways to hit back as Putin wages a shadow war, the article reports.

Intelligence agencies cite rising sabotage, infrastructure attacks, and hybrid threats.

Current security frameworks struggle with provocations staged below open warfare.

EU officials quietly brace for nightmare multiple-casualty hybrid attack scenarios.

Top priorities include stronger counter-intelligence and critical infrastructure monitoring now.

Maritime and energy assets are getting stricter protection protocols across Europe.

Analysts say passive defense is no longer enough against state-sponsored subversion.

Policy debates are intensifying over how hard Western governments should retaliate.

Read the full article for more details on Europe's shadow-war response.