## Cryptographic techniques

Security of public-key cryptography depends on keeping the private key secret; the public key can be openly distributed without compromising security.

An unpredictable (typically large and random) number is used to begin generation of an acceptable pair of keys suitable for use by an asymmetric key algorithm..

## How are cryptographic keys shared?

Shared key encryption uses one key to encrypt and decrypt messages.

For shared key cryptography to work, the sender and the recipient of a message must both have the same key, which they must keep secret from everybody else..

## How are encryption keys transferred?

Encryption keys can be exported to a file or device, and imported from a device.

Export to a file is the most secure method for transferring encryption keys.

Transferring an encryption key directly to a device is less secure because security is primarily dependent upon the password complexity..

## What is an example of a key exchange in cryptography?

Examples of key exchange schemes are: Diffie–Hellman key exchange (DHКЕ) and Elliptic-curve Diffie–Hellman (ECDH), RSA-OAEP and RSA-KEM (RSA key transport), PSK (pre-shared key), SRP (Secure Remote Password protocol), FHMQV (Fully Hashed Menezes-Qu-Vanstone), ECMQV (Ellictic-Curve Menezes-Qu-Vanstone) and CECPQ1 ( .

## What is cryptographic key management system?

Key Management is the process of putting certain standards in place to ensure the security of cryptographic keys in an organization.

Key Management deal with the creation, exchange, storage, deletion, and refreshing of keys.

They also deal with the members access of the keys..

## What is exchanging encryption keys?

In encrypted key exchange, a secret key, or password, is derived from one party's public key and another party's private key.

The shared secret key is then used to encrypt subsequent communications between the parties, who may have no prior knowledge of each other, using a symmetric key cipher..

## What is the system of keys in cryptography?

In cryptography, a key is a string of characters used within an encryption algorithm for altering data so that it appears random.

Like a physical key, it locks (encrypts) data so that only someone with the right key can unlock (decrypt) it..

- Even though Diffie-Hellman key exchange can be used for establishing both public and private keys, the Rivest-Shamir-Adleman algorithm, or RSA algorithm, can also be used, since it's able to sign public key certificates.
- The Diffie-Hellman algorithm is a method for securely exchanging cryptographic keys over insecure channels without compromising the security and integrity of data transmission.

It was developed and published in 1976 by Martin Hellman and Whitefield Diffie.