Security via Web Browser Tampering Detection

A non-transitory, computer-readable medium having stored thereon instructions that when executed by a computer system cause the computer system to perform operations comprising:

• transmitting a web page to a client device in response to a request from a web browser of the client device for the web page,
• wherein the web page includes tampering detection code that is configured to execute in response to the web page being received by the web browser of the client device, wherein execution of the tampering detection code includes determining whether a native code function of the web browser has been overridden;
• subsequent to the transmitting, receiving execution results transmitted by the tampering detection code, wherein the execution results indicate whether the native code function has been overridden;
• if the native code function has not been overridden, providing access to an electronic resource via the web page;
• and
• if the native code function has been overridden, preventing access to the electronic resource.

A method, comprising:

• a computer system transmitting a first web page to a client device in response to a request from a web browser of the client device,
• wherein the first web page includes tampering detection code that is configured to execute in response to the first web page being received by the web browser, wherein execution of the tampering detection code includes determining whether a native code function of the web browser has been overridden;
• subsequent to the transmitting, the computer system receiving execution results transmitted by the tampering detection code, wherein the execution results indicate whether the native code function has been overridden;
• and
• based on whether the native code function has been overridden, the computer system determining whether to provide access to an electronic resource.