Censys Overview

Censys is a public search engine that enables researchers to quickly ask questions about the hosts and networks that compose the Internet. Details on how Censys is architected and operated are available at About Censys. Instructions on how to use Censys are below.

Censys supports generating reports on aggregate statistics within a result set. For example, you can calculate the breakdown of cipher suites chosen by IPv4 hosts with browser trusted certificates by searching for 443.https.tls.validation.browser_trusted: true and then building a report in which you show the breakdown of the 443.https.tls.cipher_suite.name field:

Example Reports

Here are a couple of ideas to get you started: