Selective plaintext Attacks Against the uBlock Cryptographic Algorithm
Keyang Liu, Zhibo Du, Shichun Chen · 2025
Aiming at the problem of energy leakage of uBlock cryptographic algorithm at the position of wheel output, a selective plaintext attack against uBlock cryptographic algorithm is proposed, where the attack selects the encrypted plaintext with constraints, attacks the intermediate value of encrypted wheel transformation, and inverts the corresponding wheel key by encrypting the output of the wheel transformation, so as to realize a selective plaintext attack against uBlock cryptographic algorithm cryptographic algorithm with the output of the wheel as the intermediate data. algorithm's chosen plaintext attack. The energy curve of the unguarded uBlock cipher algorithm is analyzed and attacked using this method, and the experiment verifies the effectiveness of the attack method.