By Monday morning X engineers had begun pushing the first builds to Premium subscribers. A company memo seen by Business Insider says early versions lock each chat behind a four-digit pass-code until the rollout stabilises, after which the feature set will “cascade to all tiers.”
While Musk did not specify what “Bitcoin-style” encryption means, it can be speculated.
Rust implementations of those libraries—rust-secp256k1 and related crates—have been audited for years inside the BTC ecosystem. In practice, they enable a stateless, low-latency channel that retains forward secrecy once the ephemeral key material is discarded. That architecture maps neatly onto Musk’s requirements: encrypted payloads, vanishing messages, and identity decoupled from phone numbers.
At press time, BTC traded at $104,879.
