# Is it possible to construct a compression function that works exactly as MD5's CF but is much easier to compute?

Is there any chance that MD5's compression function can be represented in a completely different way so that it's much easier to compute/reverse it?

• Is the question asking for something giving the exact same result as MD5's compression function? Also, define easier. We can replace MD5's compression function by something (different) with two out of three characteristics: secure, simple enough to easily remember, and fast. – fgrieu Aug 18 '16 at 16:25
• @fgrieu I meant a function that executes much faster than MD5's compression function, and also gives the same result. – nrg Aug 18 '16 at 16:46