Cypherpunks History: 1990s Encryption Rebels Explained

By Ehtijad Ali · Updated October 2026 · About 9 minutes to read

The Cypherpunks were a small group of computer fans in the 1990s. They had one big idea: everyone should be able to keep their messages private. To make that happen, they used encryption, which is a way to scramble a message so only the right person can read it.

Three people in a 1990s office looking at an old computer screen next to a PGP folder and books about cryptography — An illustration of a 1990s workspace. The Cypherpunks shared ideas, code and privacy tools like PGP.

Back then, the internet was brand new. Email was just getting popular. Most people never thought about online privacy.

But the Cypherpunks asked a simple question: what if normal people could protect their own private messages?

This guide tells their story in plain words. You will learn who the Cypherpunks were, why encryption caused a big fight, what they built, and how their ideas later helped shape Bitcoin, Tor and the dark web.

What is in this guide?

Who were the Cypherpunks?

The Cypherpunks were people who cared about privacy, computer security and free speech. The name mixes two words: cipher (a secret code) and punk (a rebel).

The group started in 1992. Eric Hughes, Timothy C. May and John Gilmore held the first meetings in California. Soon, hundreds of people joined an online mailing list. That is like a giant group email where everyone can share ideas.

Other well-known people linked to the group or its ideas include Phil Zimmermann, Hal Finney, Nick Szabo and Wei Dai.

They did not agree on everything. But most of them believed this: people should be able to use strong encryption to protect their own information.

Their motto was simple. Don’t just talk about privacy. Build the tools that make it possible.

John Gilmore later described the group in a court paper, which you can read in the Electronic Frontier Foundation (EFF) archive. For more history, see our dark web timeline.

Why was encryption such a big fight in the 1990s?

Today, you use encryption every day without noticing. It protects you when you shop online, log in to a bank or send a private chat.

In the 1990s, things were very different. The U.S. government treated strong encryption almost like a weapon. There were strict rules about sending it to other countries.

Many people argued that encryption is just math and computer code, so everyone should be free to use and share it. This long argument became known as the crypto wars.

One famous court case, Bernstein v. U.S. Department of Justice, helped show that computer code can be a form of free speech. You can also see original papers from this time in the EFF encryption export archive.

For the Cypherpunks, this was not just a tech problem. They believed privacy should belong to everyone, not only to governments and big companies.

PGP and Phil Zimmermann

One of the biggest moments in Cypherpunk history was PGP. It stands for Pretty Good Privacy.

Phil Zimmermann made PGP in 1991. It let anyone lock their emails and files with strong encryption, for free.

PGP uses something called public-key encryption. Here is an easy way to picture it:

Imagine a mailbox with a slot. Anyone can drop a letter in. That slot is your public key.
Only you have the key that opens the mailbox. That is your private key.
So people can send you secret messages without ever meeting you to share a password.

Hands typing on a retro computer that shows an encrypted message, with notes about RSA key generation on the desk — Public-key encryption turned private messages into scrambled text that only the right key could unlock.

PGP quickly spread around the world. That caused trouble, because of the export rules. The U.S. government investigated Zimmermann for about three years. In 1996, the case was dropped without any charges.

The case made many people ask: can a person be punished just for sharing privacy software? The EFF gives a short, clear explanation of PGP.

The Cypherpunk Manifesto

On March 9, 1993, Eric Hughes wrote A Cypherpunk’s Manifesto. A manifesto is a short paper that explains what a group believes.

Hughes made an important point: privacy is not the same as secrecy.

Here is an example. You may not want the whole world to know how much money you have saved. That does not mean you are hiding something bad. It just means it is private.

One famous line from the manifesto is “Cypherpunks write code.” In other words, don’t wait for someone else to protect your privacy. Build the tools yourself and share them.

You can read the full Cypherpunk’s Manifesto online. Timothy May wrote an earlier paper in 1988 called the Crypto Anarchist Manifesto, which shared similar ideas.

What did the Cypherpunks build?

The Cypherpunks did more than write papers. They worked on real tools, such as:

Encryption tools: ways to lock messages and files.
Digital signatures: a way to prove a message really came from you, like a signature that can’t be faked.
Anonymous remailers: services that pass an email along without showing who first sent it.
Digital cash ideas: ways to send money online without a bank in the middle.
Privacy tools: software that gives people more control over their own information.

The EFF still keeps an old Cypherpunks archive with documents from the 1990s. If some of these words are new to you, our dark web glossary explains them in simple terms.

From Cypherpunks to digital cash

After private messages, the next big question was about money.

If we can send secret messages online, can we also send money without asking a bank first?

This was harder than it sounds. Digital money is just data, and data can be copied. So how do you stop someone from spending the same coin twice? This is called the double-spending problem.

Several people tried to solve it:

Wei Dai described an idea called b-money in 1998.
Nick Szabo worked on an idea called bit gold.
Hal Finney built RPOW (Reusable Proofs of Work) in 2004.

Person reading papers beside an old computer showing a digital cash program, with books on cryptography and the Cypherpunks — Years of digital cash experiments came before Bitcoin.

None of these were Bitcoin. But they show people worked on digital money for years before Bitcoin arrived. The Satoshi Nakamoto Institute keeps a page about Hal Finney’s RPOW project.

How did the Cypherpunks influence Bitcoin?

Bitcoin did not come out of nowhere.

In 2008, someone using the name Satoshi Nakamoto shared the Bitcoin white paper. It was first posted to a cryptography mailing list, a place full of people who knew Cypherpunk ideas.

Bitcoin mixed many older ideas into one system:

Public-key encryption
Digital signatures
Proof of work (computers solving hard puzzles)
A peer-to-peer network (computers talking directly to each other)
A public record of every payment

Hal Finney, a well-known Cypherpunk, was one of the first people to run Bitcoin. He received the first Bitcoin payment from Satoshi in January 2009.

Still, it would be wrong to say the Cypherpunks “invented” Bitcoin. It is more correct to say Bitcoin grew out of years of Cypherpunk work on encryption and digital cash.

Bitcoin later played a big part in dark web history. To see how, read our story of the Silk Road dark web market, one of the first big markets to use Bitcoin.

Did the Cypherpunks build the dark web?

Not exactly. This is where the story often gets too simple.

The dark web was not one project made by one group. It grew over many years from many people and tools. For example, the Tor network was first built by researchers at the U.S. Naval Research Laboratory. It went live in 2002, according to the Tor Project’s history page.

But many ideas behind the dark web were talked about by the Cypherpunks first, like:

Sending messages without showing who you are
Encrypting everything
Paying online without a bank

So the best way to say it is this: the Cypherpunks shaped the ideas and culture that later influenced parts of the private, anonymous internet. They did not build it for crime.

Like most tools, privacy tools can be used for good or bad. The same encryption that protects a reporter also protects you when you message a friend. To learn how Tor compares with other privacy tools, read Tor vs VPN: which is better for privacy?. And if you are not sure how the deep web and dark web differ, see deep web vs dark web.

Why the Cypherpunks still matter today

The internet today is huge. We bank, shop, chat, learn and play online. That means we leave behind lots of personal data, like our messages, photos, location and search history.

The old Cypherpunk question is still important: how much about yourself should you have to give away just to use the internet?

Many things the Cypherpunks hoped for came true:

Strong encryption is now used every day by billions of people.
Messaging apps can lock chats so only you and your friend can read them.
Digital signatures help prove who sent a message or file.
Digital money is now a major area of research and business.

Not every prediction came true. But their main lesson is still true: privacy can be built into software.

Questions people ask

What does Cypherpunk mean?

A Cypherpunk is a person who uses encryption and computer code to protect privacy and freedom. The word mixes “cipher” (a secret code) and “punk” (a rebel).

When did the Cypherpunks start?

The group started in 1992 in California. Most of its talks happened on an online mailing list.

What was the Cypherpunk Manifesto?

It was a short paper by Eric Hughes, published on March 9, 1993. It explained why privacy matters online and said that Cypherpunks should write code to protect it.

What is PGP encryption?

PGP stands for Pretty Good Privacy. Phil Zimmermann made it in 1991. It lets people lock their emails and files so only the right person can open them.

Did the Cypherpunks invent Bitcoin?

No. Bitcoin was made by someone using the name Satoshi Nakamoto. But Bitcoin was built on years of encryption and digital cash work that many Cypherpunks were part of.

Did the Cypherpunks create the dark web?

No. The dark web grew from many tools and people over many years. Cypherpunk ideas about privacy were an important part of that history.

Helpful sources

We used original papers and trusted archives for this guide. These are the best places to read more:

You can also read our Sources and Research page and Editorial Policy to see how we check facts.

The short version

The Cypherpunks were a group of computer fans who started working together in 1992. They believed everyone should be able to use strong encryption to keep their information private.

PGP gave regular people strong email encryption. The Cypherpunk Manifesto explained why privacy matters. Other members worked on anonymous email and digital cash, and those ideas later helped shape Bitcoin.

They did not build the dark web as one project. Their biggest gift was a simple idea that still matters today: privacy can be built with code.

Cypherpunks History and Encryption: The People Who Shaped the Dark Web