MI6 is launching its own dedicated portal on the dark web in the hope of attracting new spies online, notably from Russia.
Secure messaging platform Silent Courier aims to strengthen national security by making it easier for the intelligence agency to recruit, the Foreign Office said.
Potential agents in Russia and around the world will be targeted by the UK, it adds.
The announcement is expected to be confirmed in a speech in Istanbul by the outgoing MI6 chief Sir Richard Moore on Friday morning.
Later this month Sir Richard is due to hand over to Blaise Metreweli.
