Io direi così. Un sistema trustless, è un sistema costruito per poter funzionare in completa assenza di fiducia.
In pratica le due controparti operano senza doversi fidare l'uno dell'altro.
Ecco una spiegazione del termine
“Trustlessness” is a term often quoted as a feature of blockchain technology but what does that mean and is absolute zero trust a myth or really true? Praised as one of the characteristics that make the blockchain so revolutionary, a trustless system is one where two peers can enter a virtual hand shake agreement, i.e. smart contract, without relying on a trusted third party to facilitate.