What Is Cryptography?

Cryptography involves processes such as encryption (changing information from an easily understandable form to an unrecognizable form) and decryption (the process of returning encrypted data to its original format). Modern cryptography not only focuses on data confidentiality and privacy, but also on aspects such as data integrity, identity authentication, and non-repudiation (prevention of denial of an action).

Cryptography is very important in today's digital world, where information security is very crucial. It is used in a variety of applications, from securing email communications and online transactions to protecting sensitive data stored or transmitted. This mechanism allows us to carry out online activities safely, such as internet banking, online shopping, and exchanging personal data, by ensuring that the data transmitted is safe from interception or manipulation by unauthorized parties.

Meanwhile, in the context of cryptocurrency and blockchain, cryptography is used to secure transactions, control the creation of new units, and verify asset transfers. For example, Bitcoin uses cryptography to ensure that only the owner of the coins can send them, as well as to prevent double spending. Cryptography is also the basis of the hash function used in blockchain technology to maintain the integrity and continuity of the block chain.

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