How it works
When you send a file, Zas checks whether that exact content already exists in the network. If it does, the system skips the upload and creates a reference to the existing encrypted data. You still hold the only decryption key. The result is instant delivery without duplicate storage.Blind key derivation
Zas uses OPRF (Oblivious Pseudo-Random Function) for blind key derivation. Your client derives a key from the file content without revealing the content hash to the server. The server never sees what you are sending, and it cannot tell whether two users share the same file.Global dedup is invisible to you. It just means large files arrive faster and the system stays efficient.