Helping to Build Cloudflare, Part 2: The Worst Two Weeks

But that didn’t diminish the fact that private information (much of which would have been transmitted encrypted) had been cached by search engines. From the very first night of Cloudbleed I started collecting information to be able to write the public disclosure. And while serious, the data cached in search engines was found to contain little really private information.

Source: blog.cloudflare.com