Shared secret in the context of Key (cryptography)

Shared secret in the context of Key (cryptography)

Shared secret Study page number 1 of 1

Play TriviaQuestions Online!

 or

Skip to study material about Shared secret in the context of "Key (cryptography)"

⭐ Core Definition: Shared secret

In cryptography, a shared secret is a piece of data, known only to the parties involved, in a secure communication. This usually refers to the key of a symmetric cryptosystem. The shared secret can be a PIN code, a password, a passphrase, a big number, or an array of randomly chosen bytes.

The shared secret is either shared beforehand between the communicating parties, in which case it can also be called a pre-shared key, or it is created at the start of the communication session by using a key-agreement protocol, for instance using public-key cryptography such as Diffie–Hellman or using symmetric-key cryptography such as Kerberos.

↓ Menu
HINT:

In this Dossier

Shared secret in the context of Steganography

Steganography (/ˌstɛɡəˈnɒɡrəfi/ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such a manner that the presence of the concealed information would not be evident to an unsuspecting person's examination. In computing/electronic contexts, a computer file, message, image, or video is concealed within another file, message, image, or video. Generally, the hidden messages appear to be (or to be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a formal shared secret are forms of security through obscurity, while key-dependent steganographic schemes try to adhere to Kerckhoffs's principle.

The word steganography comes from Greek steganographia, which combines the words steganós (στεγανός), meaning "covered or concealed", and -graphia (γραφή) meaning "writing". The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic.

View the full Wikipedia page for Steganography
↑ Return to Menu
LINKED FROM (PARENTS)
← Steganography
LINKS TO (CHILDREN)
Cryptography → Secure communication → Key (cryptography) → Symmetric-key algorithm → Personal identification number → Password → Passphrase → Pre-shared key → Key-agreement protocol → Public-key cryptography → Diffie–Hellman key exchange → Kerberos (protocol) →