this is in no way more secure.... there's a bijection... any password that an attack wants to try they just double so instead of bruteforcing [aab, aac,aad] jus

this is in no way more secure.... there's a bijection... any password that an attack wants to try they just double so instead of bruteforcing [aab, aac,aad] just [aabaab, aacaac, aadaad] the only reason this makes sense to do is to annoy users into changing their password