This means the prevention of the disclosure of information to unauthorised individuals and / or systems

Low (C1)
Unauthorized disclosure of information will do no or very little harm to TenneT as a company, and no harm to the continuous and secure supply of electricity to society

Medium (C2)
Unauthorized disclosure of information could clearly harm TenneT, but do no harm to the continuous and secure supply of electricity to society

High (C3)
Unauthorized disclosure of information could do considerable harm to TenneT, but not directly to the continuous and secure supply of electricity to society

Very High (C4)
Unauthorized disclosure of information could (very) seriously and acutely harm TenneT as a company and/or directly harm the continuous and secure supply of electricity to society