In one example in accordance with the present disclosure, a method may receiving a plaintext to be encrypted. The plaintext may include a first block, a second block and a third block. The method may include generating a preliminary ciphertext based on the first block and the second block and generating, using an encryption key, a first ciphertext using an encryption operation receiving the third block and the preliminary ciphertext as inputs. The method may also include generating, using the encryption key, a first finalized ciphertext using the encryption operation receiving the first block and the first ciphertext as inputs and generating, using the encryption key, a second finalized ciphertext using the encryption operation receiving the second block and the first finalized ciphertext as inputs.