http://elctrs5bbvbrt2isymeqcjukynnermzelbafrogrwuwyevfm3rezh2yd.onion
For example, if this website was compromised and the original Electrum files had been replaced, signature verification would fail, because the attacker would not be able to create valid signatures. (Note that an attacker would be able to create valid hashes, this is why we do not publish hashes of our binaries here, it does not bring any security).