It consists of sending packets to a victim and waiting for the victim’s reply to analyze the results. Active fingerprintingĪctive fingerprinting is the most popular type of fingerprinting in use. Most digital fingerprinting techniques are based on detecting certain patterns and differences in network packets generated by operating systems.įingerprint techniques often analyze different types of packets and information such as TCP Window size, TCP Options in TCP SYN and SYN+ACK packets, ICMP requests, HTTP packets, DHCP requests, IP TTL values as well as IP ID values, etc. Just as there are many human fingerprinting techniques used to extract information from certain scenarios, in the digital world there are many ways to analyze digital fingerprints from hosts. Once the attackers have the right information, they know your scenario, and can create a full infrastructure map of all your services and possible network topology to fine-tune their digital assault. This signature is one of the keys to identify what software, protocols and OS is running the target device. These packets will receive a response from the victim in the form of a digital signature. In order to detect OS, networks, services and application names and numbers, attackers will launch custom packets to the target. How does OS and network fingerprinting work? Once the penetration tester has enough information, this fingerprinting data can be used as part of an exploit strategy against the target. Simply put, a fingerprint is a group of information that can be used to detect software, network protocols, operating systems or hardware devices.įingerprinting (also known as footprinting) is the art of using that information to correlate data sets in order to identify-with high probability-network services, operating system number and version, software applications, databases, configurations and more. ![]() What is fingerprinting in cyber security?įingerprints in the digital world are similar to what human fingerprints are in the real world. In this article we’ll explore what a fingerprint is in cyber security, different types of fingerprint techniques, and some of the most popular fingerprinting tools in use. ![]() ![]() In the digital world, there are ways to analyze fingerprints as well-but in this sense we’re talking about OS, network and service fingerprints.
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