Need Help On Weird Problem

[dp7]

Hi
You might find it strange but I need this.
Suppose You have and MD5 hash of a 64 char string.(length is fixed and only has hex chars 0-F)

Is it possible to find the first char of the string?
Or if the first char of string is alphabetic or numeric?
If it's not against the rules I'll pay for it.
Thanks

[undeath]

A fundamental feature of a cryptographic hash function is that this is not possible. So no.

[dp7]

A fundamental feature of a cryptographic hash function is that this is not possible. So no.

I just thought maybe finding the first char would be easier.
Thanks.

[royce]

Yeah, it's a normal and understandable intuition. But by design, only trying to hash the entire string will generate a hash that is then compared to the target hash. Once you understand how hashing works, the reason why will be clear.