Home▸Cryptography▸Functional Encryption: Decrypt Only f(x), Never x

🧮 Functional Encryption: Decrypt Only f(x), Never x

Encrypt a dataset, mint a functional key sk_f for sum, average or threshold, and watch decryption reveal only f(x) — never the raw records — side by side with all-or-nothing traditional encryption.

Cryptography2DModerate60 FPS

Details

CategoryCryptography

RenderingCanvas 2D

DifficultyModerate

Target FPS60

ControlsFunction selector (Sum / Average / Threshold check, with a threshold slider) chooses which function sk_f will be bound to; Generate functional key sk_f button mints a key for the selected function; Decrypt with sk_f button reveals only the computed f(x) result, never the raw records; Try raw decrypt (no key) button attempts decryption without the proper key and is denied on both panels; Unlock with FULL master key button reveals every record on the traditional-encryption panel to contrast all-or-nothing access; Reset button regenerates the dataset and clears all keys and results.

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⚙ Under the hood

Encrypt a 10-record dataset and mint a functional key sk_f bound to one function (sum, average or threshold count). Decrypting with sk_f reveals only f(x); the raw records stay opaque in the ciphertext grid the whole time. Side by side, a traditional-encryption panel shows the all-or-nothing alternative: unlock with the full master key and every record appears, or attempt raw decryption without it and the request is denied on both panels.

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2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install