Why does TOR use .onion top level domains (TLD)?

TOR uses .onion as its top-level domain (TLD) to identify websites that can only be accessed through the TOR network. This TLD is not part of the standard internet DNS (Domain Name System), and can only be accessed using the TOR network.

The use of the .onion TLD serves several important purposes. First, it allows users to easily identify and access websites that are only available through the TOR network. This makes it easier for users to find and access the type of content that is typically found on the "dark web," such as illegal or illicit material.

Second, the use of the .onion TLD helps to protect the anonymity of both users and website operators. Because .onion domains are not part of the standard internet DNS, it is difficult for third parties to track and monitor traffic to and from these websites. This helps to protect the privacy of users who access these websites, and the anonymity of the website operators who run them.

Third, the use of the .onion TLD helps to protect the integrity of the TOR network. Because .onion domains are only accessible through the TOR network, it is more difficult for third parties to interfere with or attack these websites. This helps to protect the security and reliability of the TOR network as a whole.

Overall, the use of the .onion TLD is an important part of the TOR network, and helps to ensure that it remains a secure, anonymous, and reliable way to access the internet.