Hash

Its fairly common practice these days for web sites that fetch easy user authentication to store the users drop downwords in a choped striving rather than plain text. This document attempts to project how this process itself works, and discusses the pros and cons of this technique and suggests alternatives. To take leave with, just what is a hash function? Quite simple its a one-way process of turning plain text into a hash (usually consisting of hexadecimal characters only) of a fixed length. crc32( password ) = 35C246D5 Now a hash collision is something that happens when too different eccentrics of plain text, when passed through and through and through a hash function root in similar hashes. This is something we unfeignedly dont want as it gives the attacker the ability to watch access without sagacious the original password. crc32( qzzxipe ) = 35C246D5 Now, how is an attacker going to write out that the text qzzxipe produces the same ha sh as password when passed through our crc32? Simple: tables. Hash Text ---------- ---------- E8B7BE43 a 71BEEFF9 b 06B9DF6F c ...

8CDC1683 x FBDB2615 y 62D277AF z 078A19D7 aa 9E83486D ab E98478FB ac ... In order to generate these tables, the attacker must simple reign over through a large loop a bit corresponding an odometer on a car, and for each try on word, pass it through the hash and store the result. Its then a simple suit of looking up the hash to secure what text is needed. As a side note, while composing this, I was looking for a set of collisions for the word password, by checking eve ry manageable combination of lowercase let! ters. The result:If you want to get a dependable essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper