MEMORY CONTROLLER

A memory controller used to verify authenticity of data stored in a first memory unit. The memory controller includes a secure memory unit which stores a pre-stored value representative of the authenticity of the data to be written in the first memory unit. A processing system calculates a value which is representative of the data in the first memory unit after a write cycle. The calculation of the calculated value is triggered by the write cycle. The calculated value is compared with the pre-stored value in order to verify whether the data stored in the first memory unit after the write cycle has been altered in accordance with the authenticity. By comparing the calculated value with the pre-stored value authenticity of the data stored in the first memory unit after the write cycle is verified, thus preventing the memory controller from operating in case the data written to the first memory unit is not authentic.