Chapter 6 reconstructs the technology-specific legal contours of freedom of expression in the Internet age, presenting empirical evidence of the growing importance of technology for legal practice and regulation. Since data-processing technology is a prerequisite for free speech, the starting point is privacy law. An important distinction is made between data integrity and network integrity and the discussion on net neutrality and the open Internet is revisited. The case law of the ECtHR on Article 10 ECHR is also examined to see if there is a tendency to recognise an independent ‘right to transmit’. Moreover, the activities of the Internet Corporation for Assigned Names and Numbers (ICANN) can be seen to produce technology-related standards relevant to the freedom of expression. ICANN, which is responsible for routing data packets to their destination, controls the ‘master key’ to the entire global Internet and can thus influence the conditions under which freedom of communication is possible. Finally, the chapter addresses the technical standards for the Internet developed by the independent Internet Architecture Board and the Internet Engineering Task Force, which are also crucial for the freedom of expression.