Quick Answer: What Is Cryptography In Simple Words?

What is cryptography and how does it work?

A cryptographic algorithm works in combination with a key — a word, number, or phrase — to encrypt the plaintext.

The same plaintext encrypts to different ciphertext with different keys.

A cryptographic algorithm, plus all possible keys and all the protocols that make it work comprise a cryptosystem..

What is the main purpose of cryptography?

The purpose of cryptography is to protect data transmitted in the likely presence of an adversary. As shown in Figure 10.1, a cryptographic transformation of data is a procedure by which plaintext data is disguised, or encrypted, resulting in an altered text, called ciphertext, that does not reveal the original input.

What is cryptography with example?

Cryptography is the science of protecting information by transforming it into a secure format. … An example of basic cryptography is a encrypted message in which letters are replaced with other characters. To decode the encrypted contents, you would need a grid or table that defines how the letters are transposed.

How is cryptography done?

Cryptography, at its most fundamental level, requires two steps: encryption and decryption. The encryption process uses a cipher in order to encrypt plaintext and turn it into ciphertext. Decryption, on the other hand, applies that same cipher to turn the ciphertext back into plaintext.

How many types of cryptography are there?

Three typesThree types of cryptography: secret-key, public key, and hash function.

What are the principles of cryptography?

Data Confidentiality, Data Integrity, Authentication and Non-repudiation are core principles of modern-day cryptography.

What do you mean by cryptography?

Definition: Cryptography is associated with the process of converting ordinary plain text into unintelligible text and vice-versa. It is a method of storing and transmitting data in a particular form so that only those for whom it is intended can read and process it.

What are the two types of cryptography?

Encryption Algorithms Cryptography is broadly classified into two categories: Symmetric key Cryptography and Asymmetric key Cryptography (popularly known as public key cryptography). Now Symmetric key Cryptography is further categorized as Classical Cryptography and Modern Cryptography.

What are the 3 main types of cryptographic algorithms?

There are three main types of cryptographic algorithms: (1) secret key, (2) public key, and (3) hash functions. Pick an algorithm for any one of these types (e.g., DES, AES, RSA, MD5) and describe how it works and where it is applied (For example SSL uses 3DES or DES) for message encryption. Use your own words.

What is cryptography and why is it important?

Cryptography is an essential way of preventing that from happening. It secures information and communications using a set of rules that allows only those intended—and no one else—to receive the information to access and process it.

How do we use cryptography today?

Cryptography in Everyday LifeAuthentication/Digital Signatures. Authentication and digital signatures are a very important application of public-key cryptography. … Time Stamping. … Electronic Money. … Secure Network Communications. … Anonymous Remailers. … Disk Encryption.

What hashing means?

Hashing is the process of converting a given key into another value. A hash function is used to generate the new value according to a mathematical algorithm. … A good hash function uses a one-way hashing algorithm, or in other words, the hash cannot be converted back into the original key.