⚔️ War & Conflict Mar 31, 2026 · Ryan Simons

The Chalk Mark Still Matters: Russian Espionage Handling in the Modern Era

The Cipher Brief
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The Chalk Mark Still Matters: Russian Espionage Handling in the Modern Era
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KREMLIN FILES: A brush of a hand against a park bench with chalk; or, a piece of electrical tape left on a mailbox. Sometimes it’s a coded phrase buried in a routine email with an encrypted picture. This is what Russian intelligence tradecraft looks like: subtle, disciplined, and built on signals most people would never notice. With the campaign of Russian hybrid war taking place across the European continent, it is more important than ever for NATO’s intelligence services and the general public

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