A method provides access to an integrated circuit which may comprise a storage containing an unalterable first security key and a memory containing a second security key. The method may comprise: checking the second security key by comparing the first security key and the second security key, if the second security key is valid, providing access to the integrated circuit, optionally depending on the validity of an access key, and if the second security key is invalid, enabling erasing the memory, and storing in the memory a new second security key which corresponds to the first security key. Erasing the memory may be followed by checking the erasing for completeness.