unbreakable encryption method

https://securemessagingservicespark.alderbrief.com/posts/what-to-look-for-in-a-secure-messaging-service

An unbreakable encryption method would need a key as long as the message itself, used only once, like the classic one-time pad. In practice, even our strongest algorithms, like AES-256, rely on computational limits, not mathematical certainty. So true unbreakability remains theoretical, fascinating but frustratingly out of reach.