This post presents on What do you mean by cryptography?, What do you mean by cryptography in detail?, What is cryptography example?
What do you mean by cryptography?
Cryptography refers to the science and practice of securing communication and data by converting plain text into unintelligible ciphertext, usually through the use of cryptographic algorithms and keys. Its main objective is to ensure the confidentiality, integrity and authenticity of information transmitted over unsecured channels.
Cryptography involves encoding information in a way that authorized parties can decipher and understand it, while unauthorized parties are unable to access or decrypt the encrypted data.
What do you mean by cryptography in detail?
Cryptography, in detail, involves several fundamental components and techniques. It uses mathematical algorithms to transform plain text into cipher text, a process called encryption. This transformation relies on cryptographic keys, which are used to encrypt and decrypt the data.
Symmetric-key cryptography uses a single secret key for encryption and decryption, while asymmetric-key cryptography uses a pair of keys: a public key for encryption and a private key for decryption.
Cryptography also encompasses techniques such as digital signatures to ensure data integrity and authentication, hash functions for data verification, and protocols for secure communication over networks.
What is cryptography example?
An example of cryptography is the use of AES (Advanced Encryption Standard) to encrypt sensitive data in various applications, such as securing online transactions, protecting personal information stored on devices, and keeping communication private between computers on the Internet.
AES encrypts data using a symmetric key, making it unreadable to anyone without the corresponding decryption key. This ensures that even if intercepted, the encrypted data remains secure and inaccessible to unauthorized parties.
Cryptography is so called because it comes from the Greek words “kryptos” (hidden or secret) and “graphein” (to write or draw). Together, cryptography means “hidden writing” or “secret writing”, reflecting its primary purpose of hiding information from unauthorized access or interception.
The term captures the essence of encoding information in a way that makes it unreadable to anyone other than the intended recipient, ensuring secrecy and privacy in communication.
Cryptology, in detail, encompasses both cryptography and cryptanalysis. It refers to the broader field of the study of secure communication techniques and methods for breaking or decrypting encrypted messages.
Cryptography focuses on developing secure communication systems through encryption techniques, while cryptanalysis involves analyzing and breaching these systems to discover vulnerabilities or decrypt messages without authorization. Cryptology thus includes both the creation of secure communications systems and the study of methods to defeat them, playing a crucial role in information security, privacy, and cryptographic research and development.
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