Systems and methods for inferring matches and logging-in of online users across devices

A system for associating a plurality of Internet-enabled devices with a common user profile for targeting Internet content or advertising, the system including:

• a data storage device storing instructions for associating a plurality of Internet-enabled devices with a common user profile for targeting Internet content or advertising;
• and
• a processor configured to execute the instructions to perform a method including:
• receiving, from a plurality of Internet-enabled devices, a plurality of requests for electronic content or advertising;
• extracting, from each of the plurality of requests, a source internet protocol (IP) address and a unique identifier associated with the respective Internet-enabled device;
• for a first source IP address for which requests were received over a predetermined time period, identifying at least one pair of devices, comprising two Internet-enabled devices, from which requests were received;
• determining whether the pair of devices has been identified for a second source IP address over the predetermined time period;
• calculating a probability that the pair of devices are owned or operated by a common user based at least in part on whether the pair of devices have been identified for a second source IP address;
• and
• prompting a user to either confirm a characteristic of a prior browsing session or to log-in to an account associated with the common user based on a comparison of the calculated probability to one or more thresholds.

A non-transitory computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform a method of associating a plurality of Internet-enabled devices with a common user profile for targeting Internet content or advertising, the method including:

• receiving, from a plurality of Internet-enabled devices, a plurality of requests for electronic content or advertising;
• extracting, from each of the plurality of requests, a source internet protocol (IP) address and a unique identifier associated with the respective Internet-enabled device;
• for a first source IP address for which requests were received over a predetermined time period, identifying at least one pair of devices, comprising two Internet-enabled devices, from which requests were received;
• determining whether the pair of devices has been identified for a second source IP address over the predetermined time period;
• calculating a probability that the pair of devices are owned or operated by a common user based at least in part on whether the pair of devices have been identified for a second source IP address;
• and
• prompting a user to either confirm a characteristic of a prior browsing session or to log-in to an account associated with the common user based on a comparison of the calculated probability to one or more thresholds.