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The firms — with names like MFI Soft, Vas Experts and Protei — generally got their start building pieces of Russia’s invasive telecom wiretapping system before producing more advanced tools for the country’s intelligence services.

Protei, another company, offers products that provide voice-to-text transcription for intercepted phone calls and tools for identifying “suspicious behavior,” according to one document.

Citadel and Protei did not respond to requests for comment.

In January, Citizen Lab reported that Protei equipment was used by an Iranian telecom company for logging internet usage and blocking websites.

Anton Pinchuk, co-owner of Russian technology company Protei, which according to the minutes was invited to take part in the testing, confirmed to Reuters the testing was taking place.