In late June 2017, Psiphon continued to prove its commitment to open source development (you can access our code repository here), by commissioning Cure53 to perform a security audit of our services. The security review took 22 days and a total of 9 testers to complete what was described as a review with a “vast scope” and the Cure53 testers were very thorough. This is our 2nd security audit of this kind in 3 years (you can see the results of the 1st one, performed by iSec here).