# Can a hash of the original plain text file be used to brute force an encrypted copy?

I have encrypted files stored on a public cloud, in the same directory on the cloud I have the sha256 hash of the files before they were encrypted in a text file.

The keys used to encrypt the files are stored locally. Is it plausible that someone after downloading the files could use the original hashes to help brute force the encryption?

I am thinking that it would provide no advantage but I just wanted to check.

In worst case, follow by collision problem, an adversary can find a $FILE$ that $sha256(FILE)=sha256(yourfile)$, and this leakage has not any useful information for improving bruteforce attack