Root Key

At the heart of every Digi-CA™ are at least one Root Key(s) or Root certificate(s) and one Intermediate Root certificate(s). Every Digi-CA™ certificate is made from a Public and a Private Key. A Root Key Ceremony is a procedure where a unique pair of Public and Private Root Keys is generated. Depending on the CP, the generation of the Root Keys may require notarization, legal representation, witnesses and ‘Key Holders’ to be present. This process is best explained with some examples:

Example A: Strong identification & non-repudiation for email & web access

Unless the information being accessed or transmitted is valued in terms of millions of dollars, it is probably sufficient that the Digi-CAST2™ Team conduct the Root Key Ceremony within the security of the Digi-CAST2™ Laboratory. The customer may opt to have the Root Key stored on a Luna Card or HSM, but in most cases the safe storage of the Root Key on a CD or hard disk is sufficient. The Root Key is never stored on the Digi-CA™ server.

Example B: Machine Readable Travel Document [MRTD] ID Card or e Passport

This type of environment requires much higher security than a commercial one. When conducting the Root Key Ceremony, the Government or Organization will require rigorous security checks to be conducted on all personnel in attendance. Those that are normally required to attend the Key Ceremony will include a minimum of two Administrators from the organisation, two signatories from the organisation, one lawyer, a notary and two video camera operators in addition to the Digi-CAST2™ Team.

The actual Root key-pair generation is normally conducted in a secure vault that has no communication or contact with the outside world other than a single telephone line or intercom. Once the vault is secured, all personnel present must prove their identity using at least two legally recognised forms of identification. Every person present, every transaction and every event is logged by the lawyer in a Root Key Ceremony Log Book and each page is notarized by the notary. From the moment the vault door is closed until it is re-opened, everything is also video recorded. The lawyer and the two organisation’s signatories must sign the recording and it too is then notarized.

Finally, as part of the above process, the Root Key is broken into as many as twenty-one parts and each individual part is secured in its own safe for which there is a key and a numerical lock. The keys are distributed to as many as twenty-one people and the numerical code is distributed to another twenty-one people.

Important Note: Example A and B are at opposite ends of the security spectrum and no two environments are the same. When considering the Root Key Ceremony, the Digi-CAST1™ Team of professional advisors can assist you in deciding on the most efficient level of security to reflect the level of protection required.