dido:public:ra:xapend:xapend.a_glossary:p:public_key
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dido:public:ra:xapend:xapend.a_glossary:p:public_key [2022/01/18 08:28] nick |
dido:public:ra:xapend:xapend.a_glossary:p:public_key [2022/01/18 11:38] (current) nick |
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| [[https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf]] | [[https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf]] | ||
| )). | )). | ||
| - | is a cryptographic key used with a public -key cryptographic algorithm | + | is a cryptographic key used with a **Public Key** [[dido:public:ra:xapend:xapend.a_glossary:c:cryptographic_algorithm]] |
| that is uniquely associated with an entity and that may be made public. | that is uniquely associated with an entity and that may be made public. | ||
| In an asymmetric-key (**Public Key**) cryptosystem, the **Public Key** has a | In an asymmetric-key (**Public Key**) cryptosystem, the **Public Key** has a | ||
| - | corresponding private key. The *Public Key** may be known by anyone | + | corresponding [[dido:public:ra:xapend:xapend.a_glossary:p:private_key#definition_1 | Private Key]]. The **Public Key** may be known by anyone |
| and, depending on the algorithm, may be used, for example: | and, depending on the algorithm, may be used, for example: | ||
| - | - Verify a digital signature that was generated using the corresponding private key, | + | |
| - | - Encrypt keys that can be decrypted using the corresponding private key, or | + | - Verify a digital signature that was generated using the corresponding [[dido:public:ra:xapend:xapend.a_glossary:p:private_key#definition_1 | Private Key]], |
| + | - Encrypt keys that can be decrypted using the corresponding [[dido:public:ra:xapend:xapend.a_glossary:p:private_key#definition_1 | Private Key]], or | ||
| - Compute a shared secret during a key-agreement transaction. | - Compute a shared secret during a key-agreement transaction. | ||
| Line 27: | Line 28: | ||
| A **Public Key** is also used to encrypt a message or check the legitimacy of a [[dido:public:ra:xapend:xapend.a_glossary:d:digital_signature|digital signature]]. It is accompanied by a corresponding [[dido:public:ra:xapend:xapend.a_glossary:p:private_key|private key]], which is known only to its owner. Private keys are used to decrypt messages that were created with the corresponding **Public Key** or to create signatures. In other words, a **Public Key** locks up data from unauthorized use, while a private key is used to unlock it. | A **Public Key** is also used to encrypt a message or check the legitimacy of a [[dido:public:ra:xapend:xapend.a_glossary:d:digital_signature|digital signature]]. It is accompanied by a corresponding [[dido:public:ra:xapend:xapend.a_glossary:p:private_key|private key]], which is known only to its owner. Private keys are used to decrypt messages that were created with the corresponding **Public Key** or to create signatures. In other words, a **Public Key** locks up data from unauthorized use, while a private key is used to unlock it. | ||
| - | **Public Keys** are available from a certificate authority, which issues digital certificates that prove the owner's identity and contain the owner's **Public Key**. **Public Keys** are created using an asymmetric algorithm, which pairs the **Public Key** with an associated private key. The most common algorithms used to generate **Public Key** are Rivest-Shamir-Adleman, elliptic curve cryptography, and Digital Signature Algorithm. | + | **Public Keys** are available from a [[dido:public:ra:xapend:xapend.a_glossary:c:ca]], which issues [[dido:public:ra:xapend:xapend.a_glossary:d:digital_certificate]] that prove the owner's identity and contain the owner's **Public Key**. **Public Keys** are created using an asymmetric algorithm, which pairs the **Public Key** with an associated private key. The most common algorithms used to generate **Public Key** are Rivest-Shamir-Adleman, elliptic curve cryptography, and Digital Signature Algorithm. |
| A **Public Key** can be given to any person with whom an individual wants to communicate, whereas a private key belongs to the individual it was created for and isn't shared. The **Public Key** is typically stored on a [[dido:public:ra:xapend:xapend.a_glossary:p:pki]] [[dido:public:ra:xapend:xapend.a_glossary:s:server|server]] and is used to encrypt data securely before it is sent over the [[dido:public:ra:xapend:xapend.a_glossary:i:internet|internet]]. | A **Public Key** can be given to any person with whom an individual wants to communicate, whereas a private key belongs to the individual it was created for and isn't shared. The **Public Key** is typically stored on a [[dido:public:ra:xapend:xapend.a_glossary:p:pki]] [[dido:public:ra:xapend:xapend.a_glossary:s:server|server]] and is used to encrypt data securely before it is sent over the [[dido:public:ra:xapend:xapend.a_glossary:i:internet|internet]]. | ||
dido/public/ra/xapend/xapend.a_glossary/p/public_key.1642512505.txt.gz · Last modified: 2022/01/18 08:28 by nick
