Uses

Cryptography is used in a variety of applications, including email, file sharing, blockchain, and secure communication.

Email:

Cryptography is used to secure email communications. Email messages are typically encrypted using a symmetric-key algorithm, such as the Advanced Encryption Standard (AES). This ensures that only the sender and receiver of the email can read the contents of the message.

Secure communication:

Communications are typically encrypted using a symmetric-key algorithm, such as the AES. This ensures that only the parties involved in the communication can read the contents of the message.

File sharing:

When a file is shared, it is typically encrypted using a public-key algorithm, such as the RSA algorithm. This ensures that only the intended recipient can decrypt and access the file.

Blockchain

A blockchain is a distributed ledger that is used to record transactions. Each transaction is encrypted using a public-key algorithm, such as the Elliptic Curve Digital Signature Algorithm (ECDSA). This ensures that the transaction can only be decrypted and accessed by the parties involved in the transaction.