mobility database. The study further shows that these constraints hold even when the resolution of the dataset is low. Therefore, even coarse or blurred datasets provide little anonymity. Several methods to protect user privacy in location-based services have been proposed, including the use of anonymizing servers and blurring of information. Methods to quantify privacy have also been proposed, to calculate the equilibrium between the benefit of providing accurate location information and the drawbacks of risking personal privacy. Advertising on mobile devices When the internet was first introduced, the internet became the predominant medium of advertising, shifting from newspapers and magazines. With the growth of digital advertisements, people began to be tracked using HTTP cookies, and this data was used to target relevant audiences. Since the introduction of iPhones and Androids, data brokers were also planted within apps, for further tracking. Since the growth of cookies, resulting in a $350 billion digital industry especially focused on mobile devices, digital privacy has become the main source of concern for many mobile users, especially with the rise of privacy scandals, such as the Cambridge Analytica Scandal. Recently, Apple has introduced features that prohibit advertisers from tracking a user's data without their consent, as seen with their implementation of pop-up notifications that let users decide the extent to which a company can track their behavior. Google has begun to roll out similar features, but concerns have risen about how a privacy-conscious internet will function without advertisers being able to use data from users as a form of capital. Apple has set a precedent implementing stricter crackdown on privacy, especially with their introduction of the pop-up feature, which has made it harder for businesses, especially small businesses, on other mediums, like Facebook to target relevant audiences, since these advertisers no longer have relevant data. Google, contrary to Apple, has remained relatively lax in its crackdown, supporting cookies until at least 2023, until a privacy-conscious internet solution is found. Ethical controversies over location privacy There have been scandals regarding location privacy. One instance was the scandal concerning AccuWeather, where it was revealed that AccuWeather was selling locational data. This consisted of a user's locational data, even if they opted out within Accuweather, which tracked users’ location. Accuweather sold this data to Reveal Mobile, a company that monetizes data related to a user's location. Other international cases are similar to the Accuweather case. In 2017, a leaky