What if an adversary changes the Bitcoin address that is aliased by human-readable shortname though? According to their site "you can easily delete or modify your addresses linked to your CRUX ID" which has me wondering what would prevent such an attack from happening. To make matters worse, people would feel safe that their clipboard hasn't been tampered with, while in the background payments are being routed to the wrong address without the user even having the chance to double-check.

Interesting service though, will keep an eye on it.