A Cypherpunk's Manifesto
by Eric Hughes

Privacy is necessary for an open society in the electronic
age. Privacy is not secrecy. A private matter is something one doesn't
want the whole world to know, but a secret matter is something one
doesn't want anybody to know. Privacy is the power to selectively
reveal oneself to the world.

If two parties have some sort of dealings, then each has a memory of
their interaction. Each party can speak about their own memory of
this; how could anyone prevent it? One could pass laws against it, but
the freedom of speech, even more than privacy, is fundamental to an
open society; we seek not to restrict any speech at all. If many
parties speak together in the same forum, each can speak to all the
others and aggregate together knowledge about individuals and other
parties. The power of electronic communications has enabled such group
speech, and it will not go away merely because we might want it to.

Since we desire privacy, we must ensure that each party to a
transaction have knowledge only of that which is directly necessary
for that transaction. Since any information can be spoken of, we must
ensure that we reveal as little as possible. In most cases personal
identity is not salient. When I purchase a magazine at a store and
hand cash to the clerk, there is no need to know who I am. When I ask
my electronic mail provider to send and receive messages, my provider
need not know to whom I am speaking or what I am saying or what others
are saying to me; my provider only need know how to get the message
there and how much I owe them in fees. When my identity is revealed by
the underlying mechanism of the transaction, I have no privacy. I
cannot here selectively reveal myself; I must always reveal myself.

Therefore, privacy in an open society requires anonymous transaction
systems. Until now, cash has been the primary such system. An
anonymous transaction system is not a secret transaction system. An
anonymous system empowers individuals to reveal their identity when
desired and only when desired; this is the essence of privacy.

Privacy in an open society also requires cryptography. If I say
something, I want it heard only by those for whom I intend it. If the
content of my speech is available to the world, I have no privacy. To
encrypt is to indicate the desire for privacy, and to encrypt with
weak cryptography is to indicate not too much desire for
privacy. Furthermore, to reveal one's identity with assurance when the
default is anonymity requires the cryptographic signature.

We cannot expect governments, corporations, or other large, faceless
organizations to grant us privacy out of their beneficence. It is to
their advantage to speak of us, and we should expect that they will
speak. To try to prevent their speech is to fight against the
realities of information. Information does not just want to be free,
it longs to be free. Information expands to fill the available storage
space. Information is Rumor's younger, stronger cousin; Information is
fleeter of foot, has more eyes, knows more, and understands less than
Rumor.

We must defend our own privacy if we expect to have any. We must come
together and create systems which allow anonymous transactions to take
place. People have been defending their own privacy for centuries with
whispers, darkness, envelopes, closed doors, secret handshakes, and
couriers. The technologies of the past did not allow for strong
privacy, but electronic technologies do.

We the Cypherpunks are dedicated to building anonymous systems. We are
defending our privacy with cryptography, with anonymous mail
forwarding systems, with digital signatures, and with electronic
money.

Cypherpunks write code. We know that someone has to write software to
defend privacy, and since we can't get privacy unless we all do, we're
going to write it. We publish our code so that our fellow Cypherpunks
may practice and play with it. Our code is free for all to use,
worldwide. We don't much care if you don't approve of the software we
write. We know that software can't be destroyed and that a widely
dispersed system can't be shut down.

Cypherpunks deplore regulations on cryptography, for encryption is
fundamentally a private act. The act of encryption, in fact, removes
information from the public realm. Even laws against cryptography
reach only so far as a nation's border and the arm of its
violence. Cryptography will ineluctably spread over the whole globe,
and with it the anonymous transactions systems that it makes possible.

For privacy to be widespread it must be part of a social
contract. People must come and together deploy these systems for the
common good. Privacy only extends so far as the cooperation of one's
fellows in society. We the Cypherpunks seek your questions and your
concerns and hope we may engage you so that we do not deceive
ourselves. We will not, however, be moved out of our course because
some may disagree with our goals.

The Cypherpunks are actively engaged in making the networks safer for
privacy. Let us proceed together apace.

Onward.

Eric Hughes <hughes@soda.berkeley.edu>

9 March 1993 
