Android 17 Hides Browsing From ISPs

Android 17 is set to launch with Encrypted Client Hello (ECH), a crucial privacy upgrade that encrypts the Server Name Indication (SNI) field within TLS handshakes. This new feature, standardized as RFC 9849, aims to prevent network intermediaries, such as ISPs or Wi-Fi hotspot operators, from identifying the specific websites users visit. This advancement addresses a long-standing privacy gap, as previously, even with encrypted DNS, the SNI field was transmitted in plain text.

Despite ECH's significant privacy enhancement, it has limitations. ECH's effectiveness is contingent on widespread website support, which is currently not the norm and is expected to take years to achieve. More importantly, ECH does not mask users' IP addresses. ISPs and network operators can still infer user activity based on IP connections to various services. Therefore, for comprehensive privacy, including IP address concealment and protection against tracking, a Virtual Private Network (VPN) remains essential. NordVPN, for instance, offers a solution by tunneling all traffic through its servers, masking the user's IP address and encrypting all data, regardless of whether the destination website supports ECH.