Implementation of AES encryption circuitry with CCM

Circuitry for encrypting at least a part of an input data flow and generating a tag based on the input data flow with the same ciphering algorithm and the same key, the algorithm including iterative computations by at least two operation units, the circuitry including a pipeline including an input selection unit arranged to receive first data values to generate encryption sequences with the ciphering algorithm, second data values to generate temporary tags with the ciphering algorithm and an output of the pipeline; a first stage arranged to receive an output of the input selection unit and including at least a first operation unit; and a second stage arranged to receive an output of the first stage, including at least a second operation unit and providing the output of the pipeline.