A young man uses his phone in Havana.

A young man uses his phone in Havana.

Photo: yamil lage/Agence France-Presse/Getty Images

Regarding “Tearing Down Cuba’s Cyberwall” (Review & Outlook, July 19): During the past week Psiphon has provided access to more than 2.8 million Cubans and 1,100,000 gigabytes of data on the Psiphon anti-censorship network (an average of 380 megabytes of data per person) free of charge and without speed limitation. Contrary to the article, that is certainly not slow.

The article also misrepresents Psiphon’s security, which can have significant ramifications, both for us as an organization and for users who rely on Psiphon from within highly repressive regions. Psiphon’s codebase is open-source and thus completely transparent, with a vibrant community of contributors. Psiphon has also undergone five rigorous, third-party code security audits, funded by State Department programs, with no security issues identified.

Psiphon is committed to security and transparency. We have spent more than a decade building a high degree of trust with a broad coalition of constituents, including funders, sponsors and users. Over the years Psiphon has been developed with support and oversight of international broadcasters and publicly tendered U.S. federal grants, and we have more than delivered on our commitments.

Michael Hull

President, Psiphon Inc.

Toronto