dotdotslash wrote:Can some one tell me how to recognize a md5,md4 hash ? whats the diffrence between these hashes (SHA,md5 )and all .Just by looking and if not is there any other means ..
MD4 Sums are 128 bits in length
, for example b86e130ce7028da59e672d56ad0113df. MD5 Sums are also 128 bits in length
, for example 9e107d9d372bb6826bd81d3542a419d6 (both hashes are from the phrase "The quick brown fox jumps over the lazy dog"). So I can see that it would be somewhat difficult to tell them apart. I don't believe that there is a way to know the difference just by looking at them. But you can probably guess in most cases, especially if you know when the hash (date-wise) was created. Most people will opt for a higher quality hash as the quality of hashes is found to be fragile. In the case of MD4, "Weaknesses in MD4 were demonstrated by Den Boer and Bosselaers in a paper published in 1991," (From Wikipedia) so I suspect that most programs written after 1991 utilize SHA-like or MD5 hashing.
Knowing your history really counts when it comes to hacking