md5 - Are there algorithms for putting a digest into the file being digested? -


Are there algorithms for putting digest files in digest?

In other words, it is possible to have algorithms or libraries, or to have a hash / digest of files contained in the file. It will be easy for obvious reasons, such as made in ISO's Digest. I've tried Googleing like "MD5 injection" and "Digest in file file". No luck (probably for good reason.)

Not sure whether it is mathematically possible. It seems that you will be able to roll through the file, but then you have to root the last bit (assuming the digest was the last thing in the file or object.)

Thanks, Chenz

However , with a hash inside a file (such as made in the ISO), defeats the entire security benefit of the hash. You need to get a hash from a different channel and compare it to your file.


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