Is there a way to decrypt passwords from Chrome Login Data file?
My goal is learning about the backend process of this decryption, so I don't want to use any pre-built applications.
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Google Chrome uses the operating system's API to encrypt passwords. In windows the called function is CryptProtectData.
There are several tools for decrypting Chrome passwords, but generally they involve being logged in as the user who saved them. If instead you want to proceed from scratch, I suggest you study the Microsoft documentation on the encryption function.