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Ophcrack is a program that uses rainbow tables to crack Windows log-in passwords by using LM hashes. It can run on Windows, Linux, macOS and as a Live CD, and supports LM and NTLM hashes.
Security Account Manager (SAM) is a database file in Windows that stores users' passwords and authenticates local and remote users. Learn about its features, cryptanalysis, attacks and vulnerabilities.
Winlogon is a Windows system process that handles the logon sequence, user profile loading, desktop creation, and screen saver control. Learn about its history, functions, vulnerabilities, and related terms.
Kon-Boot is a tool that allows users to login to Windows and macOS systems without knowing the correct password. It works by modifying the kernel code on the fly and supports various operating systems, features and prevention methods.
Learn how Windows creates and uses user profiles to represent the characteristics of the user. Find out the contents and functions of the profile folder, the NTUSER.DAT file, and the special profiles such as Default User and All Users.
Control-Alt-Delete is a keyboard command that reboots, ends tasks, or invokes security options on Windows computers. Learn how it was invented, how it works in different versions of Windows, and how to avoid login spoofing.
Authentication against Windows domain servers with a supplied user name/password combination. Displaying of a legal notice to the user prior to presenting the logon prompt. Automatic Logon, allowing for a user name and password to be stored and used in place of an interactive logon prompt.
Learn about EFS, a feature of Windows NTFS that provides filesystem-level encryption to protect confidential data from physical access. Find out how EFS works, its security vulnerabilities, and its compatibility with other operating systems.