cryptography

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cryptography

Aryan Kumar · Answer

Cryptography is the practice and study of techniques for secure communication in the presence of third parties or the public. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages. Cryptography is a branch of mathematics that deals with the study of secret codes and ciphers.

Cryptography is used in a wide variety of applications, including:

Secure communication: Cryptography is used to protect data that is being transmitted over a network, such as email and online banking.
Data storage: Cryptography is used to protect data that is stored on a computer or other device, such as hard drives and USB drives.
Mobile devices: Cryptography is used to protect data on mobile devices, such as smartphones and tablets.
Cloud computing: Cryptography is used to protect data that is stored in the cloud.

Cryptography is an important tool for protecting data from unauthorized access. By using cryptography, you can help to keep your data safe from hackers and other criminals.

There are two main types of cryptography: symmetric encryption and asymmetric encryption.

Symmetric encryption: Symmetric encryption uses the same key to encrypt and decrypt data. This type of encryption is faster than asymmetric encryption, but it is also less secure.
Asymmetric encryption: Asymmetric encryption uses two keys: a public key and a private key. The public key is used to encrypt data, while the private key is used to decrypt data. This type of encryption is more secure than symmetric encryption, but it is also slower.

There are many different cryptographic algorithms, but some of the most common include:

AES: AES is a symmetric encryption algorithm that is used by the U.S. government to protect classified information.
RSA: RSA is an asymmetric encryption algorithm that is used to create secure digital signatures.
Diffie-Hellman: Diffie-Hellman is an asymmetric encryption algorithm that is used to create secure key exchanges.

Cryptography is a complex and ever-evolving field. As new threats emerge, new cryptographic algorithms are developed to protect against them. Cryptography is an essential tool for protecting data in the digital age.

Prakash nidhi Verma · Answer

Cryptography : Cryptography is a technique of converting information in such a format that it is not accessible by unauthorized user without anyone decoding it back into a readable format,thus compromising the data. This is made by Crytology: Cryptography + Cryptoanalysis . Vision of crypto: classic and Modern Cryptography. Modern cryptography is the cornerstone of computer and communications security. The goal of modern cryptography is to ensure the preservation of information properties through mathematically perform. Cryptography involves the process of encryption and decryption. Objectives of cryptography:- 1- Confidentiality 2- Integrity 3- Authentication 4- Non-repudiation Cryptography primitives:- -Encryption -Hash functions -Message authentication -Digital signatures. Cryptocurrency : The Cryptocurrency in which encryption techniques are used to perform the generation of units of currency and verify the transfer of funds,operating independently of any bank.

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