Censys
Internet scan and host reconnaissance platform that maps exposed services, certificates, and infrastructure across the global web.
Technical Architecture & Overview
Censys is an internet scanning and host reconnaissance platform that indexes exposed services, certificates, and infrastructure across the global internet. It provides a web interface, API, and data feeds for security teams to map attack surfaces and investigate threats.
Targeted Technical Use Cases
Discovering and monitoring internet-facing assets, certificates, and adversary infrastructure.
Evaluation & Trade-offs
Core Strengths
- +Comprehensive internet-wide scan data on hosts, certificates, and services.
- +Frequent scanning cadence with historical data and query API.
- +Useful for attack-surface mapping and threat-hunting pivots.
Trade-Offs & Limitations
- -Free tier is limited by monthly credits and query depth.
- -Enterprise tiers require custom pricing and can be expensive for high-volume use.
Defensive Security Application
Identifying unknown internet-exposed assets, expired certificates, and adversary infrastructure during threat hunting.
Frequently Asked Questions
What is Censys?→
Censys is an internet scanning and host reconnaissance platform that indexes exposed services, certificates, and infrastructure across the global internet. It provides a web interface, API, and data feeds for security teams to map attack surfaces and investigate threats.
What is Censys used for?→
Discovering and monitoring internet-facing assets, certificates, and adversary infrastructure.
What are the strengths of Censys?→
- +Comprehensive internet-wide scan data on hosts, certificates, and services.
- +Frequent scanning cadence with historical data and query API.
- +Useful for attack-surface mapping and threat-hunting pivots.
What are the limitations of Censys?→
- +Free tier is limited by monthly credits and query depth.
- +Enterprise tiers require custom pricing and can be expensive for high-volume use.
How is Censys used defensively?→
Identifying unknown internet-exposed assets, expired certificates, and adversary infrastructure during threat hunting.