Access control for updating documents in a digital document repository

1. A digital document storing device, comprising:

a memory operable to store a digital document repository comprising a plurality of digital documents; and

a processor operably coupled to the memory, configured to:

identify a first digital document that is associated with an organization within the digital document repository;

identify a first graphical code, wherein the first graphical code is an encoded graphical representation of the first digital document;

send the first graphical code to an approved user device;

obtain a second graphical code, wherein the second graphical code is an encoded graphical representation of a public encryption key for the organization;

extract the public encryption key for the organization from the second graphical code;

obtain a third graphical code from the approved user device, wherein the third graphical code is an encoded graphical representation of a second digital document comprising data and a digital signature that was signed using a private encryption key for the organization;

extract the second digital document from the third graphical code;

validate the third graphical code using the public encryption key for the organization;

determine the third graphical code passes validation using the public encryption key for the organization; and

store the second digital document in the digital document repository.

2. The device of claim 1 , wherein:

the first graphical code is a first Quick Response (QR) code;

the second graphical code is a second QR code; and

the third graphical code is a third QR code.

3. The device of claim 1 , wherein validating the third graphical code comprises:

performing a hashing operation on the data to generate a first hash;

decrypting the digital signature using the public encryption key to recover a second hash;

comparing the first hash and the second hash; and

determining the third graphical code is valid when then first hash matches the second hash.

4. The device of claim 1 , wherein the processor is further configured to:

generate a copy of the second digital document; and

send the copy of the second digital document to a second device.

5. The device of claim 1 , wherein extracting the second digital document from the third graphical code comprises converting the third graphical code into text.

6. The device of claim 1 , wherein the data identifies one or more items that are associated with the organization.

7. The device of claim 1 , wherein the second digital document is a modified version of the first digital document.

8. A digital document storing method, comprising:

identifying a first digital document that is associated with an organization within a digital document repository;

identifying a first graphical code, wherein the first graphical code is an encoded graphical representation of the first digital document;

sending the first graphical code to an approved user device;

obtaining a second graphical code, wherein the second graphical code is an encoded graphical representation of a public encryption key for the organization;

extracting the public encryption key for the organization from the second graphical code;

obtaining a third graphical code from the approved user device, wherein the third graphical code is an encoded graphical representation of a second digital document comprising data and a digital signature that was signed using a private encryption key for the organization;

extracting the second digital document from the third graphical code;

validating the third graphical code using the public encryption key for the organization;

determining the third graphical code passes validation using the public encryption key for the organization; and

storing the second digital document in the digital document repository.

9. The method of claim 8 , wherein:

the first graphical code is a first Quick Response (QR) code;

the second graphical code is a second QR code; and

the third graphical code is a third QR code.

10. The method of claim 8 , wherein validating the third graphical code comprises:

performing a hashing operation on the data to generate a first hash;

decrypting the digital signature using the public encryption key to recover a second hash;

comparing the first hash and the second hash; and

determining the third graphical code is valid when then first hash matches the second hash.

11. The method of claim 8 , further comprising:

generating a copy of the second digital document; and

sending the copy of the second digital document to a second device.

12. The method of claim 8 , wherein extracting the second digital document from the third graphical code comprises converting the third graphical code into text.

13. The method of claim 8 , wherein the data identifies one or more items that are associated with the organization.

14. The method of claim 8 , wherein the second digital document is a modified version of the first digital document.

15. A non-transitory computer-readable medium storing instructions that when executed by a processor cause the processor to:

identify a first digital document that is associated with an organization within a digital document repository;

identify a first graphical code, wherein the first graphical code is an encoded graphical representation of the first digital document;

send the first graphical code to an approved user device;

obtain a second graphical code, wherein the second graphical code is an encoded graphical representation of a public encryption key for the organization;

extract the public encryption key for the organization from the second graphical code;

obtain a third graphical code from the approved user device, wherein the third graphical code is an encoded graphical representation of a second digital document comprising data and a digital signature that was signed using a private encryption key for the organization;

extract the second digital document from the third graphical code;

validate the third graphical code using the public encryption key for the organization;

determine the third graphical code passes validation using the public encryption key for the organization; and

store the second digital document in the digital document repository.

16. The non-transitory computer-readable medium of claim 15 , wherein:

the first graphical code is a first Quick Response (QR) code;

the second graphical code is a second QR code; and

the third graphical code is a third QR code.

17. The non-transitory computer-readable medium of claim 15 , wherein validating the third graphical code comprises:

performing a hashing operation on the data to generate a first hash;

decrypting the digital signature using the public encryption key to recover a second hash;

comparing the first hash and the second hash; and

determining the third graphical code is valid when then first hash matches the second hash.

18. The non-transitory computer-readable medium of claim 15 , wherein the instructions further cause the processor to:

generate a copy of the second digital document; and

send the copy of the second digital document to a second device.

19. The non-transitory computer-readable medium of claim 15 , wherein extracting the second digital document from the third graphical code comprises converting the third graphical code into text.

20. The non-transitory computer-readable medium of claim 15 , wherein the data identifies one or more items that are associated with the organization.