predict md5sum string [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overl开发者_运维问答y broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago.

Is there a way to make a small text file produce an md5sum of all 0's. Or any easy testable string that the likes of perl could test with. sha could be used if that gives me the result I am after, to simple have a file on my removable storage devices that tells me its mine and what it is. Ian

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The whole point of MD5, SHA and other cryptographic hashes is to make it really really difficult to find a text producing a given hash. I don't understand what you want to do, but finding a small text file producing an MD5 of all 0's is not possible. If it were, MD5 would be broken.