Anonymity

Anonymity means that a person's identity is not known. This can happen by accident, like when records get lost, or on purpose when someone chooses not to tell their name.

People sometimes stay anonymous for good reasons. For example, someone might give to charity without telling anyone, or a witness might share important information without using their name to stay safe. In everyday life, like talking to a stranger or buying something in a store, not knowing each other's names is usually normal.

Anonymity is also important for protecting privacy and freedom. In places with free elections, people can vote without others knowing how they chose. However, sometimes staying anonymous can be against the law, especially if someone is suspected of doing something wrong.

In mathematics, anonymity refers to an element in a group that cannot be identified from the group. This idea helps solve problems and understand patterns in different subjects, including computer science.

Etymology

The word "anonymous" entered English around 1600. It comes from a Latin word, "anonymus." This Latin word came from an Ancient Greek word that means "without name." The Greek word was formed by adding a prefix meaning "un-" to a word meaning "name."

Pseudonymity

Sometimes, people want to connect with others without sharing personal details. To do this, they might use a special name or number, called a pseudonym. Examples include pen names, nicknames, or even student or bank account numbers. This helps others recognize their messages over time.

Pseudonyms are common in social networks and online chats. Even though some big companies, like Google, are trying to limit their use, many people still prefer them. Using a pseudonym is called "pseudonymity," and some people use the term "anonymity" to describe hiding someone's real identity.

Psychological effects

When people are anonymous, they might feel less responsible for their actions because no one knows who they are. This can influence how they behave, both positively and negatively.

In conversations, being anonymous can help people share personal stories or feelings without worrying about being embarrassed later. Online chats make this easier because people can't see or react physically to what is said. This can be helpful when discussing private or sensitive topics.

In workplaces, anonymous communication can occur through suggestion boxes, written feedback, or hiding phone numbers. Whether this is appropriate depends on the situation—some uses are considered fine, while others are not.

Sometimes, online spaces where people are anonymous can lead to disruptive behavior. Large crowds can also make people feel anonymous, which may affect their actions. Professionals, such as judges, may appreciate anonymity to freely discuss their work strategies.

Anonymity, commerce, and crime

Anonymous buying can help keep a person's information private. Some people like to use cash for everyday things, such as groceries or tools, so sellers can't collect their details later. Credit cards are linked to a person's name and can show more information, like where they live or their phone number. The ecash system was made to let people buy things securely without giving away their identity.

Anonymity can also help protect someone from getting caught for doing something illegal. For example, when doing something wrong, many people try to hide their faces with scarves or masks and wear gloves so they don't leave fingerprints. In organized crime, groups of people may work together without sharing their real names. The movie The Thomas Crown Affair showed a made-up story where people worked together without knowing each other's identities.

Anonymity in charity

Sometimes, people give money or help to charity without telling anyone who they are. This can happen in two ways: either the person giving does not want the person receiving to know who helped them, or they do not want anyone at all to know they were the ones giving.

Many cultures and religions encourage this kind of giving. Some people prefer to help without being recognized, maybe because they feel modest or do not want attention. Others might worry that charities will ask them for more money if they know who they are.

Issues facing the anonymous

Sometimes, it can be difficult to stay anonymous because of rules made by governments or companies. For example, in the United States, people must show who they are to vote, even though their vote is kept private. At most airports, travelers need to prove their identity with an identification card before they can fly.

There are also times when being anonymous is important. Writers who want to keep their identity hidden might face challenges, especially as technology gets better at figuring out who wrote something. Some writers try to protect themselves by changing how they write.

Referring to the anonymous

When we talk about someone whose identity is unknown, people often create a special name for them. In books, the most common way to say that we don’t know the author is to call them simply "Anonymous". This is usually the case with old books where the author has passed away and we can’t ask them about their work.

Sometimes, a famous name is used to pretend to be the author. For example, someone might claim to be a well-known person from history, like Dionysius the Areopagite, an early Christian follower.

In studying old writings, scholars use the word Anonymus to talk about writers whose names are lost. These writings can still teach us important things about the past.

In art, paintings from unknown artists are sometimes given names based on their style. For example, a group of paintings was once called the work of the “Master of Flémalle” before the real artist, Robert Campin, was discovered.

In courts, when someone’s identity must stay hidden, they are called "John Doe" or "Jane Doe" depending on whether the person is male or female. These names are also used when a person’s identity cannot be found after they pass away.

In many countries, soldiers whose names are never discovered are honored in a special tomb called the Tomb of the Unknown Soldier.

Anonymity and the press

Most newspapers and magazines name the writers of their articles. But some publications, like the British weekly The Economist, choose not to name writers. In Britain, many newspapers share their main ideas without saying who wrote them. The Economist does this because many people help with their stories, and they speak as one group. Some think people share more honest thoughts when they can stay anonymous. Long ago, before the mid-1800s, many writers in Britain did not put their names on their work.

Anonymity on the Internet

Further information: Anonymous post and Internet privacy

Many people post comments online without using their real names. They often use made-up usernames instead. These usernames are not the same as the real person writing. This can help people share their thoughts more freely, but it might also make them feel less careful about what they say.

The Internet was not made to keep people anonymous. When you visit a website, your computer uses an IP address, which is like a virtual mailing address. This address can sometimes be traced back to a person or place. However, tools like I2P and Tor can help hide these addresses by sending information through many different paths.

Some websites and apps, like Chatroulette, Omegle, and Tinder, let people talk to strangers without using real names. Other apps, such as Yik Yak, Secret, and Whisper, let people share thoughts without saying who they are. Some email services, like Tuta, let you create email accounts without giving personal details. But sites like Facebook and Google+ require users to use their real names.

Anonymity online can sometimes lead to hurtful behavior because people can hide their identity. But it can also help people feel safer to share ideas or talk about things they might be nervous about. Some people choose to be anonymous online because they had bad experiences before.

Anonymity can be used for good or bad reasons. It can help people share important information without fear, or let people talk freely about difficult topics. But it can also be used to hurt others or do illegal things. The choice to be anonymous depends on what someone wants to achieve.

Legal protection of anonymity

Many people think anonymity is a right, especially when talking online. Different countries protect this right in different ways.

In the United States, anonymous speech has a long history. Important early writers used fake names, and the US Supreme Court has supported the right to speak anonymously under the First Amendment. For example, people can campaign politically without revealing their names, and they can communicate or read materials anonymously as long as they follow the law.

After events like the 2001 terrorist attack, there has been more focus on controlling anonymous communication. New laws aim to balance privacy with public safety.

The European Union also supports internet anonymity through laws that protect personal data and freedom of expression. People there have rights to keep their information private.

Some international agreements, like the Anti-Counterfeiting Trade Agreement (ACTA), have sparked debate. While designed to stop illegal copying, critics worry it might affect innocent people unfairly.

Anonymity and politics

Sometimes, people choose to stay anonymous when they talk about important issues, especially in politics. For example, important writings like The Federalist Papers were written by some of America’s Founding Fathers without using their names. This helped people discuss big ideas, like the U.S. Constitution, more freely. Being anonymous can help people share their thoughts without fear, especially online.

Anonymity and pseudonymity in art

Anonymity means staying hidden or using a fake name. Artists sometimes choose to stay anonymous to add mystery to their work, avoid too much attention, or to enter areas usually led by one group.

For example, a famous science fiction writer named Alice Bradley Sheldon wrote under the name James Tiptree, Jr. Another writer used the name JT LeRoy.

Some famous people prefer to stay out of the public eye, like authors Thomas Pynchon and J. D. Salinger. In music, groups like The Residents and The Radioactive Chicken Heads have hidden their true identities. Characters like The Lone Ranger, Superman, and Batman also hide who they really are.

Mathematics of anonymity

Imagine only Alice, Bob, and Carol have keys to a bank safe, and one day, the safe's contents go missing without breaking the lock. At first, we can't be sure if it was Alice, Bob, or Carol who took the items. Each of them could have done it, and each has an equal chance of being responsible.

If we later learn that Carol had a good reason not to be there—like she was somewhere else—then we know it must have been either Alice or Bob. In this case, the person isn't fully anonymous anymore because Alice and Bob now know it was one of the two of them.