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312-50V13 · Question #119

You are attempting to crack LM Manager hashed from Windows 2000 SAM file. You will be using LM Brute force hacking tool for decryption. What encryption algorithm will you be decrypting?

The correct answer is B. DES. The Lan Manager (LM) hash, used in older Windows systems like Windows 2000 for storing user passwords, utilizes the DES encryption algorithm.

Submitted by lucia.co· Mar 6, 2026System Hacking

Question

You are attempting to crack LM Manager hashed from Windows 2000 SAM file. You will be using LM Brute force hacking tool for decryption. What encryption algorithm will you be decrypting?

Options

  • AMD4
  • BDES
  • CSHA
  • DSSL

How the community answered

(38 responses)
  • A
    3% (1)
  • B
    89% (34)
  • C
    3% (1)
  • D
    5% (2)

Why each option

The Lan Manager (LM) hash, used in older Windows systems like Windows 2000 for storing user passwords, utilizes the DES encryption algorithm.

AMD4

MD4 is the hashing algorithm primarily used for NTLM hashes, which superseded LM hashes but is a different algorithm.

BDESCorrect

The LM hash algorithm splits passwords into 7-character blocks, converts them to uppercase, and then uses the DES (Data Encryption Standard) algorithm to encrypt a fixed string, resulting in the final hash. This weak encryption, combined with other vulnerabilities, makes LM hashes highly susceptible to brute-force attacks.

CSHA

SHA (Secure Hash Algorithm) is a family of cryptographic hash functions, significantly stronger than DES, and was not used for LM hashes.

DSSL

SSL (Secure Sockets Layer) is a protocol for securing network communications, not a password hashing algorithm.

Concept tested: LM hash algorithm (DES)

Source: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2003/cc759524(v=ws.10)

Topics

#LM hash#DES#password cracking#Windows SAM

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