Granted Patent B2

US 11,251,974 · App. 13/750,742 · Granted Feb 15, 2022

Inventors: Quentin Liu (San Jose, CA); Marc Williams (San Jose, CA); Richard F. Andrews (Menlo Park, CA)

Assignee: DigiCert, Inc.

H04L9/3263H04L9/0891H04L63/0823H04L2209/56

Abstract

Claims (65)

1. A method comprising:

receiving, over a network and from a client computing device associated with a user, a request to split a first digital certificate, wherein the user is approved to be associated with the first digital certificate, wherein the first digital certificate is used to verify an identity of the user by linking a public key, a first name, and a second name;

extracting, by at least one computer processor, the first name and the second name from the first digital certificate, wherein extracting the first and second names comprises extracting the first name from a Subject data field of the first digital certificate and the second name from a SubjectAltName extension of the first digital certificate;

in response to receiving the request to split the first digital certificate, and based at least in part on approval of the user to be associated with the first digital certificate, provisioning, by the at least one computer processor, a second digital certificate with the first name and a third digital certificate with the second name, wherein the first name is stored in a Subject data field of the second digital certificate, and wherein the second name is stored in a Subject data field of the third digital certificate;

issuing the second digital certificate and the third digital certificate to the user based at least in part on approval of the user to be associated with the first digital certificate; and

delivering authentication information using either the second digital certificate or the third digital certificate to verify the identity of the user.

2. The method of claim 1 , wherein the first digital certificate comprises a first public key, the method further comprising:

extracting the first public key from the first digital certificate,

wherein provisioning the second and third digital certificates comprises provisioning the second and third digital certificates with the first public key.

3. The method of claim 1 , wherein the first digital certificate comprises a first public key, the method further comprising:

receiving a first certificate signing request and a second certificate signing request, wherein:

the first certificate signing request comprises a second public key different from the first public key,

the second certificate signing request comprises a third public key different from the first public key,

provisioning the second digital certificate comprises provisioning the second digital certificate with the second public key, and

provisioning the third digital certificate comprises provisioning the third digital certificate with the third public key.

4. The method of claim 1 , wherein the first digital certificate further comprises a third name stored in the SubjectAltName extension, the method further comprising:

extracting the third name from the SubjectAltName extension of the first digital certificate; and

provisioning a fourth digital certificate with the third name, wherein the third name is stored in a Subject data field of the fourth digital certificate.

5. The method of claim 4 , wherein the first digital certificate comprises a first public key, the method further comprising:

extracting the first public key from the first digital certificate,

wherein provisioning the second, third, and fourth digital certificates comprises provisioning the second, third, and fourth digital certificates with the first public key.

6. The method of claim 4 , wherein the first digital certificate comprises a first public key, the method further comprising:

receiving a first certificate signing request, a second certificate signing request, and a third certificate signing request, wherein:

the first certificate signing request comprises a second public key different from the first public key,

the second certificate signing request comprises a third public key different from the first public key,

the third certificate signing request comprises a fourth public key different from the first public key,

provisioning the second digital certificate comprises provisioning the second digital certificate with the second public key,

provisioning the third digital certificate comprises provisioning the third digital certificate with the third public key, and

provisioning the fourth digital certificate comprises provisioning the fourth digital certificate with the fourth public key.

7. The method of claim 1 , wherein provisioning the second digital certificate with the first name and the third digital certificate with the second name comprises digitally signing the second and third digital certificates with a private key of a certificate authority.

8. A system comprising:

a network interface configured to receive, over a network and from a client computing device associated with a user, a request to split a first digital certificate, wherein the user is approved to be associated with the first digital certificate, wherein the first digital certificate is used to verify an identity of the user by linking a public key, a first name, and a second name;

one or more memories that store instructions and the first digital certificate; and

at least one computer processor, operatively coupled to the one or more memories and the network interface, configured to execute the instructions to:

extract the first name and the second name from the first digital certificate, wherein, to extract the first and second names, the at least one computer processor is configured to extract the first name from a Subject data field of the first digital certificate and the second name from a SubjectAltName extension of the first digital certificate;

based at least in part on approval of the user to be associated with the first digital certificate, provision a second digital certificate with the first name and a third digital certificate with the second name, wherein the first name is stored in a Subject data field of the second digital certificate, and wherein the second name is stored in a Subject data field of the third digital certificate;

issue the second digital certificate and the third digital certificate to the user based at least in part on approval of the user to be associated with the first digital certificate; and

deliver authentication information using either the second digital certificate or the third digital certificate to verify the identity of the user.

9. The system of claim 8 , wherein the first digital certificate comprises a first public key, and wherein the at least one computer processor is further configured to extract the first public key from the first digital certificate and to provision the second and third digital certificates with the first public key.

10. The system of claim 8 , wherein the first digital certificate comprises a first public key, and wherein the at least one computer processor is further configured to:

receive a first certificate signing request and a second certificate signing request, wherein:

the first certificate signing request comprises a second public key different from the first public key;

the second certificate signing request comprises a third public key, different from the first public key; and

the at least one computer processor is further configured to provision the second digital certificate with the second public key and the third digital certificate with the third public key.

11. The system of claim 8 , wherein the first digital certificate further comprises a third name stored in the SubjectAltName extension, wherein the at least one computer processor is further configured to extract the third name from the SubjectAltName extension of the first digital certificate and to provision a fourth digital certificate with the third name, wherein the third name is stored in a Subject data field of the fourth digital certificate.

12. The system of claim 11 , wherein the first digital certificate comprises a first public key, wherein the at least one computer processor is further configured to extract the first public key from the first digital certificate and to provision the second, third, and fourth digital certificates with the first public key.

13. The system of claim 11 , wherein the first digital certificate comprises a first public key, and wherein the at least one computer processor is further configured to:

receive a first certificate signing request, a second certificate signing request, and a third certificate signing request, wherein:

the first certificate signing request comprises a second public key different from the first public key;

the second certificate signing request comprises a third public key different from the first public key;

the third certificate signing request comprises a fourth public key different from the first public key; and

the at least one computer processor is further configured to provision the second digital certificate with the second public key, the third digital certificate with the third public key, and the fourth digital certificate with the fourth public key.

14. The system of claim 8 , wherein the at least one computer processor is further configured to digitally sign the second and third digital certificates with a private key of a certificate authority.

15. A method for a certificate authority to facilitate efficient splitting of a first digital certificate into at least second and third digital certificates, the method comprising:

receiving, with at least one computer processor, from a client computing device associated with a user, a request to split the first digital certificate, the first digital certificate including a first name in a Subject data field and a second name in a SubjectAltName extension, wherein the user is approved to possess the first digital certificate, wherein the first digital certificate is used to verify an identity of the user by linking a public key, a first name, and a second name;

extracting, with the at least one computer processor, the first name from a Subject field of the first digital certificate and the second name from a SubjectAltName extension of the first digital certificate;

in response to the request to split the first digital certificate and based at least in part on approval of the user to possess the first digital certificate, provisioning, by the at least one computer processor, a second digital certificate with the first name and a third digital certificate with the second name, wherein the first name is stored in a Subject data field of the second digital certificate and wherein the second name is stored in a Subject data field of the third digital certificate;

issuing the second digital certificate and the third digital certificate to the user based at least in part on approval of the user to possess the first digital certificate; and

delivering authentication information using either the second digital certificate or the third digital certificate to verify the identity of the user.

16. The method of claim 15 , further comprising:

determining, with the at least one computer processor, a validity end date of the first digital certificate, wherein provisioning the second and third digital certificates comprises provisioning the second and third digital certificates with the same validity end date as the first digital certificate.

17. The method of claim 15 , wherein provisioning the second and third digital certificates comprises provisioning the second and third digital certificates with different validity end dates.

18. The method of claim 15 , wherein provisioning comprises digitally signing the second and third digital certificates with a private key of a certificate authority.

19. The method of claim 15 , wherein the first digital certificate comprises a first public key, the method further comprising:

extracting the first public key from the first digital certificate, wherein provisioning the second and third digital certificates comprises provisioning the second and third digital certificates with the first public key.

Assignments (10)

Continuity (2)

Cited By (1)

US 12,701,117