I have just downloaded an ISO from an official mirror down in Belarus, and noticed that its checksum is different from the same downloaded in Germany. Both checksums are consistent with those in your docs, but the problem is that they are different in the two countries. How to download an ISO the same as in Germany? A localized ISO is glitchy and heavy on CPU. Can it also have some vulnerabilities or backdoor software installed? Are mirrors like byfly.by being checked by anyone in this regard?