Detecting a change to the content of information displayed to a user of a website
Methods and systems are provided for detecting a change in web content of a web page. In particular, executable instructions may be inserted into a web page such that a first fingerprint of the web page is created when viewed on a client device. The first fingerprint may then be compared to a previously created fingerprint to determine if the web page has been modified. The fingerprints may be based on one or more elements of the web page.
1. A method for detecting a change in content of a web page, comprising:
identifying a first combination of first and second different types of objects on a web page for protection, wherein the first and second different types of objects are a subset of objects comprising the web page;
creating a first fingerprint based on the first combination of first and second different types of objects;
receiving an instance of the web page, wherein the instance of the web page includes a second combination of objects corresponding to the first combination of first and second different types of objects that are the subset of objects comprising the web page;
injecting executable instructions into the instance of the web page before the web page reaches a user, such that, upon execution, the executable instructions create a second fingerprint based upon the second combination of objects;
receiving the second fingerprint; and
determining whether one or more objects of the second combination of objects have been modified by comparing the second fingerprint to the first fingerprint.
2. The method of claim 1 , wherein a modification of the one or more objects of the second combination of objects is detected if the first fingerprint and the second fingerprint do not match.
3. The method of claim 2 , further comprising:
providing a second web page when the modification of the one or more objects of the second combination of objects is detected.
4. The method of claim 1 , wherein the first fingerprint is based on a combination of two or more objects of the instance of the web page and the second fingerprint is based on the same combination of two or more objects.
5. The method of claim 1 , wherein one or more objects of the second combination of objects include at least one of a Document Object Model (DOM) object, an iFrame, a Hyper Text Mark-up Language (HTML) tag, an HTML object, an HTML attribute, and HTML content.
6. The method of claim 1 , further comprising:
receiving an indication of a number of values sent from a client, wherein a modification of the one or more objects of the second combination of objects is detected based on the first fingerprint and the second fingerprint not matching and the indication of the number of values sent from the client.
7. The method of claim 1 , wherein creating the first fingerprint includes generating a hash value based on the first combination of first and second different types of objects.
8. The method of claim 1 , wherein the first combination of first and second different types of objects is a random subset of objects on the web page.
9. A method comprising:
identifying a first combination of first and second different types of objects on a web page for protection, wherein the first and second different types of objects are a subset of objects comprising the web page;
generating a first fingerprint of the web page, wherein the first fingerprint is based on the first combination of first and second different types of objects of the web page;
receiving an instance of the web page, wherein the instance of the web page includes a second combination of objects corresponding to the first combination of first and second different types of objects that are the subset of objects comprising the web page;
injecting executable instructions into the received instance of the web page before the web page reaches a user such that, upon execution at a client device, the executable instructions create a second fingerprint of the instance of the web page based upon the second combination of objects; and
determining whether one or more objects of the second combination of objects have been modified by comparing the first fingerprint to the second fingerprint.
10. The method of claim 9 , wherein a modification of the one or more objects of the second combination of objects is detected if the first fingerprint and the second fingerprint do not match.
11. The method of claim 10 , further comprising:
providing a second web page when the modification of the one or more objects of the second combination of objects is detected.
12. The method of claim 9 , wherein the first fingerprint is based on a combination of two or more objects of the instance of the web page and the second fingerprint is based on the same combination of two or more objects.
13. The method of claim 9 , wherein one or more objects of the second combination of objects include at least one of a Document Object Model (DOM) object, an iFrame, a Hyper Text Mark-up Language (HTML) tag, an HTML object, an HTML attribute, and HTML content.
14. The method of claim 9 , wherein generating the first fingerprint includes generating a hash value based on the first combination of first and second different types of objects.
15. A system comprising:
at least one processor; and
memory encoding computer executable instructions that, when executed by the at least one processor, perform a method comprising:
identifying a first combination of first and second different types of objects on a web page for protection, wherein the first and second different types of objects are a subset of objects comprising the web page;
generating a first fingerprint of the web page, wherein the first fingerprint is based on the first combination of first and second different objects;
receiving an instance of the web page, wherein the instance of the web page includes a second combination of objects corresponding to the first combination of first and second different types of objects that are the subset of objects comprising the web page;
injecting executable instructions into the received instance of the web page before the web page reaches a user;
receiving a second fingerprint of the instance of the web page based upon the second combination of objects and the executable instructions; and
determining whether one or more objects of the second combination of objects have been modified by comparing the first fingerprint to the second fingerprint.
16. The system of claim 15 , wherein a modification of the one or more objects of the second combination of objects is detected if the first fingerprint and the second fingerprint do not match.
17. The system of claim 16 , wherein the method further comprises providing a second web page when the modification of the one or more objects of the second combination of objects is detected.
18. The system of claim 15 , wherein the first fingerprint is based on a combination of two or more objects of the instance of the web page and the second fingerprint is based on the same combination of two or more objects.
19. The system of claim 15 , wherein one or more objects of the second combination of objects include at least one of a Document Object Model (DOM) object, an iFrame, a Hyper Text Mark-up Language (HTML) tag, an HTML object, an HTML attribute, and HTML content.
20. The system of claim 15 , wherein the first combination of first and second different types of objects is a subset of objects on the web page.