In an email dated June 9, 2016, Facebook CEO Mark Zuckerberg directed engineers at his company to find a method of obtaining "reliable analytics" about Snapchat, which he noted that Facebook lacked due to Snapchat's network traffic being encrypted.[11] The solution Facebook engineers proposed to Zuckerberg's directive was to use Onavo, which allowed the company to read network traffic on a device prior to its being encrypted, thereby giving the company the ability "to measure detailed in-app activity" and to collect analytics on Snapchat app usage from devices on which Onavo was installed.[11] It did this by creating "fake digital certificates to impersonate trusted Snapchat, YouTube, and Amazon analytics servers to redirect and decrypt secure traffic from those apps for Facebook’s strategic analysis."