LM Hash

LM hash, LanMan, or LAN Manager hash is a compromised password hashing function that was the primary hash that Microsoft LAN Manager and Microsoft Windows versions prior to Windows NT used to store user passwords. Support for the legacy LAN Manager protocol continued in later versions of Windows for backward compatibility, but was recommended by Microsoft to be turned off by administrators; as of Windows Vista, the protocol is disabled by default, but continues to be used by some non-Microsoft CIFS implementations.

Read more about LM HashAlgorithm, Security Weaknesses, Workarounds, Reasons For Continued Use

Other articles related to "lm hash, lm, hash":

Security Accounts Manager - Removing LM Hash
... to disable the creation and storage of valid LM hashes when the user changes their password ... enabling this setting does not immediately clear the LM hash values from the SAM, but rather enables an additional check during password change operations that will instead store a "dummy" value in the ...
LM Hash - Reasons For Continued Use
... time to add support for the stronger protocols that Microsoft has created to replace LM hashing because the open source communities supporting these libraries first had to ... of NTLM protocols to replace LM authentication Product NTLMv1 support NTLMv2 support Windows NT 3.1 RTM (1993) Not supported Windows NT 3.5 RTM (1994) Not ... of Windows using WINNT.EXE, something that requires LM hashing to be enabled for the legacy LAN Manager networking stack to work ...
Defense Against Rainbow Tables
... For example, consider a password hash that is generated using the following function (where "+" is the concatenation operator) saltedhash(password) = hash(password+salt) saltedhash(pa ... used, the salt, password, and a number of intermediate hash values are run through the underlying hash function multiple times to increase the computation time required to hash each password ... repeatedly feeds the salt, password, and current intermediate hash value back into the underlying MD5 hash function ...