A method of a product control system comprising product control entities for provisioning a computer related product unit, wherein said product control entities are arranged to support the generation and communication of product identifiers, wherein the system for provisioning a computer related product unit comprises an authenticity responsible entity and a manufacturing entity, said method comprising the steps of: manufacturing a product unit at the manufacturing entity; maintaining a product control database at the product authenticity responsible entity; assigning a first identifier to the product unit for the purpose of establishing a boot integrity identity of the product unit, said first identifier being an asymmetric private-public encryption key pair stored in the product control database maintained in said authenticity responsible entity, wherein said first identifier indicating the boot integrity identity is generated by the product authenticity responsible entity; storing a copy of the public part of said first identifier indicating a public boot integrity key in a memory of the product unit; assigning a second identifier to the product unit for the purpose of establishing a logistics identity of the product unit, said second identifier comprising manufacturing information such as a serial number for the product unit; assigning a third identifier to the product unit for the purpose of establishing a production identity of the product unit, said third identifier being an asymmetric private-public encryption key pair generated by activating a tamper proof encryption key generator chip provided in the product unit and maintaining said private part of said third identifier indicating a production identity non-accessible in said tamper proof encryption key generator chip, thereby disabling re-use of the private part of said third identifier in a second product unit; extracting, from said tamper proof encryption key generator chip, a copy of the public part of said third identifier indicating a production identity; storing said second identifier indicating the logistics identity and storing a copy of the public part of said third identifier indicating a production identity in the product control database maintained in said authenticity responsible entity. manufacturing a product unit at the manufacturing entity; maintaining a product control database at the product authenticity responsible entity; assigning a first identifier to the product unit for the purpose of establishing a boot integrity identity of the product unit, said first identifier being an asymmetric private-public encryption key pair stored in the product control database maintained in said authenticity responsible entity, wherein said first identifier indicating the boot integrity identity is generated by the product authenticity responsible entity; storing a copy of the public part of said first identifier indicating a public boot integrity key in a memory of the product unit; assigning a second identifier to the product unit for the purpose of establishing a logistics identity of the product unit, said second identifier comprising manufacturing information such as a serial number for the product unit; assigning a third identifier to the product unit for the purpose of establishing a production identity of the product unit, said third identifier being an asymmetric private-public encryption key pair generated by activating a tamper proof encryption key generator chip provided in the product unit and maintaining said private part of said third identifier indicating a production identity non-accessible in said tamper proof encryption key generator chip, thereby disabling re-use of the private part of said third identifier in a second product unit; extracting, from said tamper proof encryption key generator chip, a copy of the public part of said third identifier indicating a production identity; storing said second identifier indicating the logistics identity and storing a copy of the public part of said third identifier indicating a production identity in the product control database maintained in said authenticity responsible entity.