Make sure "2017.1" is replaced with the current version you downloaded. Once that is extracted, we want to type the following into a terminal window. Run it followed by the path to the file to unzip the ISO image you downloaded.ĭon't Miss: Hide Your IP Address with a Proxy Server There are many ways to unzip a file on Linux, but what worked for me was a command included by default in Kali called unxz. Once the image has been downloaded, open up a terminal window and use cd to navigate to the folder where you downloaded the file to. You can choose to download it over HTTP or torrent. For a shorter download, we will be selecting the smallest ISO, the "Kali armel" image, to download. To run our test, go to the Kali ISO downloads page to locate our example file to download. Now let's open our favorite Linux distro, Kali Linux, and open up the browser.
Stay on this webpage, as we'll need to compare the hash against that number shortly. On their site, they helpfully display their checksum in an SHA-256 hash format by clicking the "Display Checksum" button.
For this test, we will be using the download page of VLC media player for Windows. Next, let's compare a downloaded hash by going to a website that displays the checksum for a download. It is a very simple to install just follow the on-screen prompts. Make sure to download and install the most recent and stable version. You can download that from the official 7-Zip download page. This tool isn't only for comparing the checksum, but also for compressing and decompressing files and folders. The first thing we are going to do is download a program for Windows called 7-Zip.
In this article, I will demonstrate how to compare the SHA-256 hash of a file downloaded with the one provided by the file's author first on a Windows system, and then on Kali Linux. This kind of attack is a weakness in SHA-1 and other cryptographic functions but takes significant time and resources to attempt to exploit.ĭon't Miss: Make an Unbreakable Linux Password Using a SHA-2 Hash Algorithm If you can cause two different files to generate the same checksum, this creates an extremely rare condition called a collision. In essence, when we calculate a hash, it is a one-way cryptographic function, meaning a change to a single bit will generate a new, seemingly random number that is very hard to arrive at again.
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