Secrecy is the practice of hiding information from certain individuals or groups who do not have the "need to know", perhaps while sharing it with other individuals. That which is kept hidden is known as the secret.
Secrecy is often controversial, depending on the content or nature of the secret, the group or people keeping the secret, and the motivation for secrecy.

Secrecy by government entities is often decried as excessive or in promotion of poor operation; excessive revelation of information on individuals can conflict with virtues of
privacy
Privacy (, ) is the ability of an individual or group to seclude themselves or information about themselves, and thereby express themselves selectively.
The domain of privacy partially overlaps with security, which can include the concepts of a ...
and
confidentiality. It is often contrasted with
social transparency.
Secrecy can exist in a number of different ways: encoding or
encryption (where mathematical and technical strategies are used to hide messages), true secrecy (where restrictions are put upon those who take part of the message, such as through
government security classification) and
obfuscation, where secrets are hidden in plain sight behind complex idiosyncratic language (
jargon) or
steganography.
Another classification proposed by
Claude Shannon in 1948 reads that there are three systems of secrecy within communication:
# Concealment systems, including such methods as invisible ink, concealing a message in a harmless text in a fake covering cryptogram, or other methods in which the existence of the message is concealed from the enemy.
# Privacy systems, for example,
voice inversion, is a special equipment required to recover the message.
# "True" secrecy systems where the meaning of the message is concealed by the cypher, code, etc. Although, its existence is not hidden. The enemy is assumed to have any special equipment necessary to intercept and record the transmitted signal.
Sociology
Animal
Animals are multicellular, eukaryotic organisms in the Biology, biological Kingdom (biology), kingdom Animalia (). With few exceptions, animals heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, ...
s conceal the location of their
den or
nest
A nest is a structure built for certain animals to hold Egg (biology), eggs or young. Although nests are most closely associated with birds, members of all classes of vertebrates and some invertebrates construct nests. They may be composed of ...
from
predators. Squirrels bury nuts, hiding them, and they try to remember their locations later.
Human
Humans (''Homo sapiens'') or modern humans are the most common and widespread species of primate, and the last surviving species of the genus ''Homo''. They are Hominidae, great apes characterized by their Prehistory of nakedness and clothing ...
s attempt to consciously conceal aspects of themselves from others due to
shame, or from
fear of violence, rejection, harassment, loss of
acceptance, or loss of
employment
Employment is a relationship between two party (law), parties Regulation, regulating the provision of paid Labour (human activity), labour services. Usually based on a employment contract, contract, one party, the employer, which might be a cor ...
. Humans may also attempt to conceal aspects of their own
self which they are not capable of incorporating psychologically into their
conscious being.
Families sometimes maintain "
family secrets", obliging family members never to discuss disagreeable issues concerning the family with outsiders or sometimes even within the family. Many "family secrets" are maintained by using a mutually agreed-upon construct (an official family story) when speaking with outside members. Agreement to maintain the secret is often coerced through "shaming" and reference to family
honor. The information may even be something as trivial as a
recipe.

Secrets are sometimes kept to provide the pleasure of surprise. This includes keeping secret about a
surprise party, not telling
spoilers of a story, and avoiding
exposure of a magic trick.
Keeping one's
strategy
Strategy (from Greek στρατηγία ''stratēgia'', "troop leadership; office of general, command, generalship") is a general plan to achieve one or more long-term or overall goals under conditions of uncertainty. In the sense of the " a ...
''secret''– is important in many aspects of
game theory.
In
anthropology
Anthropology is the scientific study of humanity, concerned with human behavior, human biology, cultures, society, societies, and linguistics, in both the present and past, including archaic humans. Social anthropology studies patterns of behav ...
secret sharing is one way for people to establish traditional relations with other people. A commonly used narrative that describes this kind of behavior is
Joseph Conrad's short story "
The Secret Sharer".
Government
Government
A government is the system or group of people governing an organized community, generally a State (polity), state.
In the case of its broad associative definition, government normally consists of legislature, executive (government), execu ...
s often attempt to conceal information from other governments and the public. These state secrets can include
weapon
A weapon, arm, or armament is any implement or device that is used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime (e.g., murder), law ...
designs, military plans,
diplomatic negotiation tactics, and secrets obtained illicitly from others ("
intelligence"). Most nations have some form of
Official Secrets Act (the
Espionage Act in the U.S.) and classify material according to the level of protection needed (hence the term "
classified information"). An individual needs
security clearancefor access and other protection methods, such as keeping documents in a
safe, are stipulated.
Few people dispute the desirability of keeping
Critical Nuclear Weapon Design Information secret, but many believe government secrecy to be excessive and too often employed for political purposes. Many countries have laws that attempt to limit government secrecy, such as the U.S.
Freedom of Information Act and
sunshine laws. Government officials sometimes
leak information they are supposed to keep secret. (''For a recent (2005) example, see
Plame affair.'')
Secrecy in elections is a growing issue, particularly secrecy of vote counts on computerized vote counting machines. While voting, citizens are acting in a unique sovereign or "owner" capacity (instead of being a subject of the laws, as is true outside of elections) in selecting their government servants. It is argued that secrecy is impermissible as against the public in the area of elections where the government gets all of its power and taxing authority. In any event, permissible secrecy varies significantly with the context involved.
Corporations
Organizations, ranging from multi-national for profit
corporation
A corporation or body corporate is an individual or a group of people, such as an association or company, that has been authorized by the State (polity), state to act as a single entity (a legal entity recognized by private and public law as ...
s to nonprofit
charities, keep secrets fo
competitive advantage to meet legal requirements, or, in some cases, to conceal nefarious behavior. New products under development, unique manufacturing techniques, or simply lists of customers are types of information protected by
trade secret
A trade secret is a form of intellectual property (IP) comprising confidential information that is not generally known or readily ascertainable, derives economic value from its secrecy, and is protected by reasonable efforts to maintain its conf ...
laws.
Research on corporate secrecy has studied the factors supporting secret organizations. In particular, scholars in economics and management have paid attention to the way firms participating in cartels work together to maintain secrecy and conceal their activities from antitrust authorities. The diversity of the participants (in terms of age and size of the firms) influences their ability to coordinate to avoid being detected.
The
patent
A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an sufficiency of disclosure, enabling discl ...
system encourages inventors to publish information in exchange for a limited time
monopoly on its use, though patent applications are initially secret.
Secret societies use secrecy as a way to attract members by creating a sense of importance.
Shell companies may be used to launder money from criminal activity, to finance terrorism, or to evade taxes. Registers of
beneficial ownership aim at fighting corporate secrecy in that sense.
Other laws ''require'' organizations to keep certain information secret, such as
medical records (
HIPAA in the U.S.), or
financial report
Financial statements (or financial reports) are formal records of the financial activities and position of a business, person, or other entity.
Relevant financial information is presented in a structured manner and in a form which is easy to un ...
s that are under preparation (to limit
insider trading). Europe has particularly strict laws about
database
In computing, a database is an organized collection of data or a type of data store based on the use of a database management system (DBMS), the software that interacts with end users, applications, and the database itself to capture and a ...
privacy.
Computing

Preservation of secrets is one of the goals of
information security
Information security is the practice of protecting information by mitigating information risks. It is part of information risk management. It typically involves preventing or reducing the probability of unauthorized or inappropriate access to data ...
. Techniques used include
physical security and
cryptography
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), ...
. The latter depends on the secrecy o
cryptographic keys Many believe that security technology can be more effective if it itself is not kept secret.
Information hidingis a design principle in much
software engineering
Software engineering is a branch of both computer science and engineering focused on designing, developing, testing, and maintaining Application software, software applications. It involves applying engineering design process, engineering principl ...
. It is considered easier to verify software reliability if one can be sure that different parts of the program can only access (and therefore depend on) a known limited amount of information.
Military

Military secrecy is the concealing of information about martial affairs that is purposely not made available to the general public and hence to any enemy, in order to gain an advantage or to not reveal a weakness, to avoid
embarrassment, or to help in
propaganda efforts. Most military secrets are tactical in nature, such as the strengths and weaknesses of
weapon systems,
tactics, training methods, plans, and the number and location of specific weapons. Some secrets involve information in broader areas, such as secure communications,
cryptography
Cryptography, or cryptology (from "hidden, secret"; and ''graphein'', "to write", or ''-logy, -logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of Adversary (cryptography), ...
, intelligence operations, and cooperation with third parties.
US Government rights in regard to military secrecy were uphold in the
landmark legal case of ''
United States v. Reynolds'', decided by the
Supreme Court in 1953.
Views
Excessive secrecy is often cited
as a source of much human conflict. One may have to
lie in order to hold a secret, which might lead to
psychological
Psychology is the scientific study of mind and behavior. Its subject matter includes the behavior of humans and nonhumans, both consciousness, conscious and Unconscious mind, unconscious phenomena, and mental processes such as thoughts, feel ...
repercussions. The alternative, declining to answer when asked something, may suggest the answer and may therefore not always be suitable for keeping a secret. Also, the other may insist that one answer the question.
Nearly 2500 years ago,
Sophocles wrote: 'Do nothing secretly; for Time sees and hears all things, and discloses all.'.
Gautama Siddhartha said: "Three things cannot long stay hidden: the
sun, the
moon
The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...
and the
truth
Truth or verity is the Property (philosophy), property of being in accord with fact or reality.Merriam-Webster's Online Dictionarytruth, 2005 In everyday language, it is typically ascribed to things that aim to represent reality or otherwise cor ...
.".
See also
*
Ambiguity
Ambiguity is the type of meaning (linguistics), meaning in which a phrase, statement, or resolution is not explicitly defined, making for several interpretations; others describe it as a concept or statement that has no real reference. A com ...
*
Banking secrecy
*
Black project
*
Clandestine cell system
*
Classified information
*
Concealment device
*
Confidentiality
*
Conspiracy theory
*
Covert operation
A covert operation or undercover operation is a military or police operation involving a covert agent or troops acting under an assumed cover to conceal the identity of the party responsible.
US law
Under US law, the Central Intelligence A ...
*
Cover-up
*
Deception
Deception is the act of convincing of one or many recipients of untrue information. The person creating the deception knows it to be false while the receiver of the information does not. It is often done for personal gain or advantage.
Tort of ...
*
Don't ask, don't tell
*
Espionage
Espionage, spying, or intelligence gathering, as a subfield of the intelligence field, is the act of obtaining secret or confidential information ( intelligence). A person who commits espionage on a mission-specific contract is called an ...
*
Freedom of information legislation
*
Media transparency
*
Need to know
*
Open secret
*
Secrecy (sociology)
*
Secret passage
*
Secret sharing
*
Self-concealment
*
Somebody Else's Problem
*
Smuggling
*
State Secrets Privilege
* ''
Sub rosa''
*
WikiLeaks
WikiLeaks () is a non-profit media organisation and publisher of leaked documents. It is funded by donations and media partnerships. It has published classified documents and other media provided by anonymous sources. It was founded in 2006 by ...
References
* *
*
*
*
*
*
*
*
*
*
*
*
*
::Also available as:
Preview.
Further reading
*
External links
An Open Source Collection of Readings on SecrecySecrecy Newsfrom the
Federation of American Scientists
{{Authority control
Classified information