Functional Key sk_f

Function f

Decrypt

Status

Records (x)10

sk_f minted for—

Raw data ever exposed?No

Functional encryption gives out a key sk_f that decrypts only the output of one chosen function f — never the plaintext records themselves. Traditional encryption is all-or-nothing: the full master key reveals everything, and without it you get nothing.

Ciphertext — same encrypted records, two decryption models

Traditional encryption locked

All-or-nothing: reveals every record, or none.

Functional encryption locked

No functional key yet — records stay opaque.