CDT today testified before the Senate Commerce Committee regarding the privacy implications of online advertising. CDT noted that consumers are increasingly concerned about the growing amount of personal data being collected by online advertising practices, but that they are ill-equipped to take steps to protect their privacy. CDT also said that the emerging advertising model partnering ISPs with ad networks brings new legal complexities and privacy risks to the e-commerce equation. CDT urged Congress to take a comprehensive look at online advertising practices and made several recommendations for designing policies and laws that insure consumer privacy and instill trust in the electronic marketplace.