A typical example of the second category (decorrelation) is a technique known as "blinding". In the case of RSA decryption with secret exponent formula_1 and corresponding encryption exponent formula_2 and modulus formula_3, the technique applies as follows (for simplicity, the modular reduction by "m" is omitted in the formulas): before decrypting, that is, before computing the result of formula_4 for a given ciphertext formula_5, the system picks a random number formula_6 and encrypts it with public exponent formula_2 to obtain formula_8. Then, the decryption is done on formula_9 to