LM and MD5 Hash Security and Cracking from Mandy Corcoran's blog

In this paper I will focus on Encryption and how to Crack encrypted hashes with out the decryption key. Let’s start with an evidence or the idea behind encryption. Encryption is used to secure or disguise knowledge from unauthorized personal and has been round from about 1800 BC and is not going away. There is at all times going to be a need to safe information and keep it out of unauthorized hands. Now with that stated there is always going to be new methods to break the encryption and with computer systems getting faster. Crackers will learn to break the encryption faster than ever. We're going to take a look at encryption algorithms for passwords LM & MD5.

LAN Man Hash (LM)

LAN Man Hash (LM) is a Microsoft Encryption Algorithm used to Encrypt Passwords for Windows NT, ninety five, ninety eight, ME 2000, XP, and 2003 Server. All though within the latest variations of windows (XP, 2003, Vista) Microsoft has now switched to NTLM for many encryption but LM is still extensively used. LM is made by taking the users password and changing it to all uppercase and them splitting the password into seven character halves. Each seven character half is transformed to a sixteen bit hash and them each half’s are mixed to make a thirty- bit hash witch is the whole LM Hash.

LM Hash Instance:

ED39C160E34521DCBF02B3DFE230653A = CERT276ROSENVA

ED39C160E34521DC BF02B3DFE230653A = CERT276 ROSENVA

1st 7 upper Encrypted 2nd 7 Higher encrypted pass

^ pass^

Message Digest 5 (free md5 decrypter)

MD5 hash is a 128-bit (sixteen-byte) hash and are typically represented as 32-digit hexadecimal numbers. The MD5 (Message-Digest algorithm 5) was designed by Ronald Rivest in 1991 and was made to interchange old algorithms. At this time the MD5 hash is widely used and for the most part is secure. The perfect thing to recollect is that with any password you want to make it complicated and long. The most effective passwords are 15 characters or longer containing both upper and decrease case letter with numbers and other special characters too.

MD5 Hash Instance:

16d2c02aad8d116bc403f73454a5eeb1 = emocan

32-Digit Hash pass^

Cracking Password Hashes

Cracking password hashes could be simple if in case you have time and patience. What I mean by that is that with most basic cracking methods you might be running the hash thought a dictionary and hoping the password is within the dictionary you might be using. This can take time and you're just shooting the hash right into a list. The opposite commonest cracking technique is to use Burteforce cracking. Burteforce cracking is the technique of throwing all doable characters at the password until you discover the match. That is essentially the most time consuming methodology of cracking and might take years to crack a complex password. The final methodology we are going to discus is Rainbow Crack. Rainbow Crack is a Hash cracking utility made by Zhu Shuanglei. Zhu’s Utility is based on Philippe Oechslin's sooner time-memory trade-off technique. Rainbow Crack is a pre-compulated Burteforce assault and the assault knowledge is stored in a data base called a rainbow table. With Rainbow Tables it's potential to crack complicated passwords 100’s or 1,000’s of time fast them with a standard Burteforce attack. The downside to rainbow tables is that it takes quite a lot of time to make the tables sets. On the opposite side of this as soon as a table set is made it can be saved and reused as many time as you need. To make the tables you want rcrak.exe and it's reconvened to have a bunch or giant number of computer systems available to make the tables. There are numerous places on-line theses days selling table units or memberships to used on-line tables submission services.

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By Mandy Corcoran
Added Apr 17



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