dido:public:ra:xapend:xapend.a_glossary:p:private_key

A **Private Key**^{1)} is a Cryptographic Key used with a Public Key Cryptographic Algorithm
that is uniquely associated with an entity and is not made public. In an
asymmetric-key ( Public Key) cryptosystem, the private key has a
corresponding Public Key. Depending on the algorithm, the private key
may be used, for example:

- Compute the corresponding Public Key,
- Compute a digital signature that may be verified by the corresponding Public Key,
- Decrypt keys that were encrypted by the corresponding Public Key, or
- Compute a shared secret during a key-agreement transaction.

A **Private Key**, also known as a secret key, is a variable in cryptography that is used with an algorithm to encrypt and decrypt code. Secret keys are only shared with the key’s generator, making it highly secure. **Private Keys** play an important role in symmetric cryptography, asymmetric cryptography, and cryptocurrencies.

The complexity and length of the private key determine how feasible it is for an interloper to carry out a brute force attack and try out different keys until the right one is found.

Public Key are for encrypting data by anyone with access to the Public Key. The **Private Key** is required to decrypt the data, which is why the Private key needs to be kept secret.

Source: https://searchsecurity.techtarget.com/definition/private-key

Elaine Barker,
NIST,
*Recommendation for Key Management: Part 1 - General*,
NIST Special Publication 800-57 Part 1, Revision 5,
May 2020,
Accessed 18 January 2022,
https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf

dido/public/ra/xapend/xapend.a_glossary/p/private_key.txt · Last modified: 2022/01/18 08:34 by nick

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