Security is the ability to trust the applications you use—that the parties involved are who they say they are—and keep those applications safe. 例えば、ウェブを閲覧する場合、HTTPS証明書がセキュリティが提供します。
Certificates prove you are talking directly to the website you're visiting, and keep attackers on your network from reading or modifying the data sent to or from the website.
匿名性とは、永続的な識別子なしに行動できる能力のことです。 You might achieve this online with [Tor](../tor.md), which allows you to browse the internet with a random IP address and network connection instead of your own.
**Pseudonymity** is a similar concept, but it allows you to have a persistent identifier without it being tied to your real identity. If everybody knows you as `@GamerGuy12` online, but nobody knows your real name, that is your pseudonym.
All of these concepts overlap, but it is possible to have any combination of these. The sweet spot for most people is when all three of these concepts overlap. However, it's trickier to achieve than many initially believe. Sometimes, you have to compromise on some of these, and that's okay too. This is where **threat modeling** comes into play, allowing you to make informed decisions about the [software and services](../tools.md) you use.
A common counter-argument to pro-privacy movements is the notion that one doesn't need privacy if they have **"nothing to hide."** This is a dangerous misconception, because it creates a sense that people who demand privacy must be deviant, criminal, or wrong.
A common definition of privacy is that it is the ability to *control* who has access to your data. This is an easy trap to fall into, in fact it is the definition of privacy we operated this website on for a long time. It sounds nice, and it appeals to many people, but in practice it just doesn't work.
たとえばクッキー同意フォームを見てみましょう。 You may encounter these dozens of times per day on the various websites you visit, with a nice array of checkboxes and sliders which allow you to "curate" your preferences to exactly fit your needs. In the end, we just hit the "I Agree" button, because we just want to read the article or make a purchase. Nobody wants to complete a personal privacy audit on every single website they visit. This is an exercise in [choice architecture](https://en.wikipedia.org/wiki/Choice_architecture), designed to make you take the easy route out instead of delving into a maze of configuration options that don't need to exist in the first place.
==Control over your privacy inside most apps is an illusion.== It's a shiny dashboard with all sorts of choices you can make about your data, but rarely the choices you're looking for, like "only use my data to help me." This type of control is meant to make you feel guilty about your choices, that you "had the choice" to make the apps you use more private, and you chose not to.
Privacy is something we need to have baked into the [software and services](../tools.md) we use by default, you can't bend most apps into being private on your own.
- [@Thorin-Oakenpants on Anonymity vs Privacy vs Security](https://code.privacyguides.dev/privacyguides/privacytools.io/issues/1760#issuecomment-10452)
