rsync currently uses MD4 or MD5 for comparing files and file chunks. There are known attacks attacks against both hashes, we should add support for SHA-256. See https://fedoraproject.org/wiki/Features/StrongerHashes for more information and more detailed rationale
I would suggest pursuing this in combination with bug 348161.
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
*** This bug has been marked as a duplicate of bug 1126713 ***