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Rainbow tables ophcrack4/12/2023 So ophcrack uses these rainbow tables and compares the hashes stored in these tables to the ones generated by Windows. The reason these rainbow tables are pre-computed is because it would a ridiculously long amount of time to generate these hashes. You can easily downloaded rainbow tables off the internet. Rainbow tables are pre-computed tables that contain a list of hundreds of millions of hashes. Ophcrack uses tables more formally known as rainbow tables. Now hashes don’t work both ways, what that means is you can create a hash from a password, but you can take a hash and change it back to text because you can’t easily decrypt them. Windows uses a thing called MD5 Hashes, so what it basically does is when you type a password and create it, it creates a cryptographic hash. To understand how ophcrack cracks password we must first learn about how Windows stores password.Īny computer system that requires password authentication must contain a database of passwords, either hashed or in plaintext. ![]() Ophcrack can be used to crack passwords for Windows XP, Vista and Windows 7. ![]() ![]() Ophcrack is a special kind of Linux distro that focuses primarily on password cracking, Ophcrack is basically a free open source program that requires a Linux based environment to run.
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