This means that not only should Bob not know that \(M\) is from Alice, but an evesdropper, Eve, should also not be able to determine that Alice is communicating with Bob. Say that Alice wants to send a message \(M\) to Bob, but wants to conceal her identity when doing so. Let’s try to understand in a little more detail how anonymity works when dealing with cryptography. We will see a couple of ways to circumvent this further down the road. An issue that you might be thinking about right now is that you have to place your trust into this proxy server as they are now able to have access to your identity, so you are not quite completely anonymous, and you would be completely correct. To hide your identity, you can route your traffic through a proxy server, which visits \(on your behalf, gets the page, and returns the page to you. Say for example you wanted to visit a website, \(but you don’t want to reveal to that server that you are visiting them.
The key takeaway here is that for the good guys to gain anonymity, we generally require some help, and what this comes down to is to simply ask someone else to send the message for you (as we saw in the previous example).Ī majority of anonymity techniques require the use of a proxy, an intermediary (usually a somewhat trusted 3rd party) who relays our traffic for us. Malicious users, however, have it easier when it comes to anonymity due to the existence of botnets, which come about when someone hacks a set of machines and then controls those machines for various purposes (each machine is essentially a bot in the hands of the person who hacked it).
As we will soon come to understand, anonymity on the internet is difficult without help baked into the internet protocol is placing the IP address into the packet header, meaning that any message that is sent to a server reveals your IP address (which reveals quite a bit about your identity and is often one of the primary means of internet tracing). Note that anonymity is not the same as confidentiality, which is about keeping the message private, whereas anonymity is concerned with keeping one’s identity private. In the context of the Internet, we may want anonymous communications wherein the identity of the source and/or destination are concealed. This is the basis of anonymity, essentially a methodology that enables you to conceal your identity. This way your message gets posted to the forum but without your name attached to it. One possible solution would be to randomly choose one member of the group on the participant list, send them a private message with your message and have them post the message with their name instead.
How would you go about using the chat to achieve that? Imagine you wanted to use a group messaging app to share a public message but did not want your name attached to your message. This site uses Just the Docs, a documentation theme for Jekyll.
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