Mathematical models prove that being a double agent is a self-destructive experiment that is guaranteed to fail.
April 24, 2026
Original Paper
Le Bureau des Légendes: A Dynamic Theory of Double Agents
SSRN · 6549899
The Takeaway
Double agents operate within a narrow corridor of survival where they must perfectly balance the competing beliefs of two rival intelligence agencies. Game theory shows that this state is structurally transient and cannot be maintained indefinitely. To stay alive, the agent must constantly provide information to both sides, but this very act eventually reveals their true nature. The math suggests that the collapse of a double agent's cover is an inevitable result of the information they are forced to share. No amount of skill or luck can overcome the fundamental instability of playing both sides of a conflict.
From the abstract
This paper models double agents-individuals coerced into simultaneously serving two rival intelligence agencies-as a finite-horizon trilateral game between Agency A, Organization B, and the Mole M. The double agent persists within a corridor of survival : a set of bilateral beliefs under which both principals continue the relationship. Under a linear-quadratic-Gaussian benchmark, we obtain a closed-form characterization of the corridor geometry, analytical upper bounds on expected duration, and