US 2022/0191241 A1 · Javascript engine fingerprinting using landmark features and API selection and evaluation

Abstract

A method and apparatus for data collection to facilitate bot detection. According to this approach, and in lieu of conventional user agent-based fingerprinting, a client script is executed to attempt to identify one or more Javascript “landmark” features. In one embodiment, a landmark Javascript feature is a Javascript implementation that exists in a first browser type but not a second browser type distinct from the first browser type, and that also exists in one or more releases of the first browser type, but not in one or more other releases of the first browser type. By testing against landmark Javascript features as opposed to an unconstrained set of API calls and the like, the technique herein provides for much more computationally-efficient client-side operation.

Claims20

Dependent claims

A method for data collection at a client to facilitate bot detection, comprising:

receiving a script configured to collect fingerprint data;
for a given browser type as identified in the script, executing a first evaluation against one or more application programming interface (API) calls as identified in the script;
for a particular API call, determining whether the particular API call is supported by the browser;
upon determining that the particular API call is supported by the browser, executing a second evaluation against one or more function calls associated with the particular API call;
and
returning, as a fingerprint, information identifying the browser type and version.

3 more elements

Dependencies are inferred from the claim text.

Javascript engine fingerprinting using landmark features and API selection and evaluation

Life of this patent

Javascript engine fingerprinting using landmark features and API selection and evaluation

Life of this patent

Abstract

Claims20