Practical fully secure unrestricted inner product functional encryption modulo a prime p. (Chiffrement fonctionel sans restrictions pour le calcul de produits scalaires modulo un nombre premier.)

Functional encryption (FE) is an advanced cryptographic primitive which allows, for a single encrypted message, to finely control how much information on the encrypted data each receiver can recover. To this end many functional secret keys are derived from a master secret key. Each functional secret key allows, for a ciphertext encrypted under the associated public key, to recover a specific function of the underlying plaintext.