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2. Challenge–response authentication - Wikipedia

   en.wikipedia.org/wiki/Challenge–response...

   Password storage. To avoid storage of passwords, some operating systems (e.g. Unix-type) store a hash of the password rather than storing the password itself. During authentication, the system need only verify that the hash of the password entered matches the hash stored in the password database.

3. Time-based one-time password - Wikipedia

   en.wikipedia.org/wiki/Time-based_One-Time_Password

   Time-based one-time password. Time-based one-time password ( TOTP) is a computer algorithm that generates a one-time password (OTP) using the current time as a source of uniqueness. As an extension of the HMAC-based one-time password algorithm (HOTP), it has been adopted as Internet Engineering Task Force (IETF) standard RFC 6238. [1] TOTP is ...

4. Internet fraud - Wikipedia

   en.wikipedia.org/wiki/Internet_fraud

   Internet fraud is a type of cybercrime fraud or deception which makes use of the Internet and could involve hiding of information or providing incorrect information for the purpose of tricking victims out of money, property, and inheritance. [1] Internet fraud is not considered a single, distinctive crime but covers a range of illegal and ...

5. Password - Wikipedia

   en.wikipedia.org/wiki/Password

   Password. A password, sometimes called a passcode, is secret data, typically a string of characters, usually used to confirm a user's identity. Traditionally, passwords were expected to be memorized, [1] but the large number of password-protected services that a typical individual accesses can make memorization of unique passwords for each ...

6. Microsoft Office password protection - Wikipedia

   en.wikipedia.org/wiki/Microsoft_Office_password...

   Microsoft Office password protection is a security feature that allows Microsoft Office documents (e.g. Word, Excel, PowerPoint) to be protected with a user-provided password. Types [ edit ] There are two types of passwords that can be set to a document: [1]

7. John the Ripper - Wikipedia

   en.wikipedia.org/wiki/John_the_Ripper

   John the Ripper is a free password cracking software tool. [3] Originally developed for the Unix operating system, it can run on fifteen different platforms (eleven of which are architecture-specific versions of Unix, DOS, Win32, BeOS, and OpenVMS ). It is among the most frequently used password testing and breaking programs [4] as it combines ...