System and method of presenting dynamically-rendered content in structured documents

• US 10,587,585 B2
• Filed: 12/31/2016
• Issued: 03/10/2020
• Est. Priority Date: 12/31/2016
• Status: Active Grant

• Current Assignee: Entefy Inc.
• Original Assignee: Entefy Inc.
• Inventors: Ghafourifar, Alston
• Primary Examiner(s): Rashid, Harunur
• Assistant Examiner(s): Taylor, Sakinah White
• Application Number:
  US15/396,480
• Publication Number:
  US 20180191686A1
• Time in Patent Office: 1,165 Days
• Field of Search: 713168
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/105 Multiple levels of security
• CPC Class Codes: H04L 9/14 using a plurality of keys or algorithms

Abstract

Users desire a system that provides for the setting of custom, content-agnostic, permissions at a message, document, and/or sub-document-level through a communications network. Such a system may also allow the user to apply customized privacy settings and encryption keys differently to particular parts of a document. Customized encryption keys may be applied to particular parties (or groups of parties) to enhance the security of the permissions settings. In the case of structured document file types, dynamically-rendered content can present a challenge to accurately display to viewers, because one or more of the document'"'"'s values referred to by the dynamically-rendered content may be encrypted or otherwise unavailable to the recipient—even though the dynamically-rendered content itself is viewable by the recipient. Systems are presented herein to handle the presentation of dynamically-rendered content in structured documents, while preserving the sender'"'"'s intent to not disclose certain underlying or related information in the document.

Claims

1. A non-transitory computer readable medium comprising computer executable instructions stored thereon to cause one or more processing units to:

obtain a first document, wherein the first document comprises a first plurality of content values;

calculate present values for the first plurality of content values;

store the calculated present values for the first plurality of content values;

receive an indication of a first portion of the first document;

receive a first permissions setting for the first portion;

receive an indication of a first recipient for the first portion;

generate a first encryption key for the first portion based, at least in part, on the first permissions setting for the first portion and the indicated first recipient of the first portion;

encrypt the first portion using the first generated encryption key for the first portion;

adjust a second portion of the first document, wherein the second portion of the first document refers to the first portion of the document in order to determine its content value, wherein adjusting the second portion of the first document comprises converting the second portion from dynamically-rendered content into statically-rendered content;

receive an indication of a third portion of the first document;

receive a second permissions setting for the third portion;

receive an indication of a second recipient for the third portion;

generate a second encryption key for the third portion based, at least in part, on the second permissions setting for the third portion and the indicated second recipient of the third portion; and

encrypt the third portion using the second generated encryption key for the third portion; and

adjust a fourth portion of the first document, wherein the fourth portion of the first document refers to the third portion of the document in order to determine its content value,

wherein the first portion and the third portion of the first document are different; and

transmit the first document to the first recipient.

2. The non-transitory computer readable medium of claim 1, wherein the first portion comprises a spreadsheet cell in the first document.

3. The non-transitory computer readable medium of claim 1, wherein the first portion comprises a spreadsheet cell referred to by a backing formula of another spreadsheet cell in the first document.

4. The non-transitory computer readable medium of claim 1, wherein the first permissions setting comprises an indication that at least one of the following classes of recipients shall have access to the first portion of the first document:

public, followers, particular contacts, and user-defined groups.

5. The non-transitory computer readable medium of claim 1, wherein the second portion comprises a spreadsheet cell whose value is determined, at least in part, by evaluating one or more formulae, references, or macros.

6. The non-transitory computer readable medium of claim 1, wherein adjusting the second portion of the first document further comprises:

replacing the second portion of the first document with the stored calculated present value corresponding to the second portion and removing any formulae, references, or macros corresponding to the second portion.

7. The non-transitory computer readable medium of claim 6, wherein the stored calculated present value corresponding to the second portion comprises the content value of the second portion at the moment the first document is transmitted to the first recipient.

8. The non-transitory computer readable medium of claim 1, wherein the instructions further cause the one or more processing units to create a reference table for the first plurality of content values.

9. A system, comprising:

a memory; and

one or more processing units, communicatively coupled to the memory, wherein the memory stores instructions to configure the one or more processing units to;

obtain a first document, wherein the first document comprises a first plurality of content values;

calculate present values for the first plurality of content values;

store the calculated present values for the first plurality of content values;

receive an indication of a first portion of the first document;

receive a first permissions setting for the first portion;

receive an indication of a first recipient for the first portion;

generate a first encryption key for the first portion based, at least in part, on the first permissions setting for the first portion and the indicated first recipient of the first portion;

encrypt the first portion using the first generated encryption key for the first portion;

adjust a second portion of the first document, wherein the second portion of the first document refers to the first portion of the document in order to determine its content value, wherein adjusting the second portion of the first document comprises converting the second portion from dynamically-rendered content into statically-rendered content;

receive an indication of a third portion of the first document;

receive a second permissions setting for the third portion;

receive an indication of a second recipient for the third portion;

generate a second encryption key for the third portion based, at least in part, on the second permissions setting for the third portion and the indicated second recipient of the third portion; and

encrypt the third portion using the second generated encryption key for the third portion; and

adjust a fourth portion of the first document, wherein the fourth portion of the first document refers to the third portion of the document in order to determine its content value,

wherein the first portion and the third portion of the first document are different; and

transmit the first document to the first recipient.

10. The system of claim 9, wherein the first portion comprises a spreadsheet cell in the first document.

11. The system of claim 9, wherein the first portion comprises a spreadsheet cell referred to by a backing formula of another spreadsheet cell in the first document.

12. The system of claim 9, wherein the first permissions setting comprises an indication that at least one of the following classes of recipients shall have access to the first portion of the first document:

public, followers, particular contacts, and user-defined groups.

13. The system of claim 9, wherein the second portion comprises a spreadsheet cell whose value is determined, at least in part, by evaluating one or more formulae, references, or macros.

14. The system of claim 9, wherein adjusting the second portion of the first document comprises:

replacing the second portion of the first document with the stored calculated present value corresponding to the second portion and removing any formulae, references, or macros corresponding to the second portion.

15. The system of claim 14, wherein the stored calculated present value corresponding to the second portion comprises the content value of the second portion at the moment the first document is transmitted to the first recipient.

16. The system of claim 9, wherein the instructions further configure the one or more processing units to create a reference table for the first plurality of content values.

17. A computer-implemented method, comprising:

obtaining a first document, wherein the first document comprises a first plurality of content values;

calculating present values for the first plurality of content values;

storing the calculated present values for the first plurality of content values;

receiving an indication of a first portion of the first document;

receiving a first permissions setting for the first portion;

receiving an indication of a first recipient for the first portion;

generating a first encryption key for the first portion based, at least in part, on the first permissions setting for the first portion and the indicated first recipient of the first portion;

encrypting the first portion using the first generated encryption key for the first portion;

adjusting a second portion of the first document, wherein the second portion of the first document refers to the first portion of the document in order to determine its content value, wherein adjusting the second portion of the first document comprises converting the second portion from dynamically-rendered content into statically-rendered content;

receiving an indication of a third portion of the first document;

receiving a second permissions setting for the third portion;

receiving an indication of a second recipient for the third portion;

generating a second encryption key for the third portion based, at least in part, on the second permissions setting for the third portion and the indicated second recipient of the third portion; and

encrypting the third portion using the second generated encryption key for the third portion; and

adjusting a fourth portion of the first document, wherein the fourth portion of the first document refers to the third portion of the document in order to determine its content value,

wherein the first portion and the third portion of the first document are different; and

transmitting the first document to the first recipient.

18. The method of claim 17, wherein the first portion comprises a spreadsheet cell referred to by a backing formula of another spreadsheet cell in the first document.

19. The method of claim 17, wherein adjusting the second portion of the first document further comprises:

replacing the second portion of the first document with the stored calculated present value corresponding to the second portion and removing any formulae, references, or macros corresponding to the second portion.

20. The method of claim 19, wherein the stored calculated present value corresponding to the second portion comprises the content value of the second portion at the moment the first document is transmitted to the first recipient.

21. The method of claim 17, wherein the first permissions setting comprises an indication that at least one of the following classes of recipients shall have access to the first portion of the first document:

public, followers, particular contacts, and user-defined groups.

22. The method of claim 17, wherein the second portion comprises a spreadsheet cell whose value is determined, at least in part, by evaluating one or more formulae, references, or macros.