An internal but not integrated security token is provided for a device which includes a first integrated circuitry including a secure processor. The security token is provided by a second integrated circuitry separate from the first circuitry. The second integrated circuitry includes a secure non-volatile storage. The secure processor communicates information to the second circuitry in a secure manner for the secure information to be securely stored in the secure non-volatile storage, and the second integrated circuitry communicates information stored in its secure non-volatile storage to the secure processor in a secure manner. Communications is secured by means of cryptography. The first integrated circuitry and the second integrated circuitry are internal parts of the device. An initialization method for distributing a secure key to be shared between the circuitries and to be used in cryptography is also disclosed.