What is cryptography?

What is cryptography?

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Cryptography. What is it, really?

What is cryptography? - managed it security services provider

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It sounds like something out of a spy movie, doesnt it?

What is cryptography? - managed service new york

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(Think elaborate codes, secret messages, and gadgets that only Q could build.) And in a way, it is related to all of that. But at its core, cryptography is simply the art and science of keeping information secret.


More formally, we can define cryptography as the practice and study of techniques for secure communication in the presence of adversaries.

What is cryptography? - managed services new york city

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(An adversary is just a fancy word for someone trying to eavesdrop or tamper with your message.) It involves converting ordinary, readable information (we call this “plaintext”) into an unintelligible form (known as “ciphertext”).

What is cryptography? - managed service new york

    This transformation is done using a specific algorithm and a secret key.


    Think of it like this: you have a diary (your plaintext). You want to make sure your nosy sibling cant read it.

    What is cryptography? - managed service new york

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    So, you decide to use a simple code.

    What is cryptography? - managed services new york city

      You replace every "a" with a "z," every "b" with a "y," and so on.

      What is cryptography?

      What is cryptography? - managed service new york

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        (This is a very basic, and easily breakable, cryptographic method, by the way!) Your coded diary is now the ciphertext. The rule you used to change the letters (a to z, b to y, etc.) is the algorithm, and your secret knowledge of that rule is the key. Only someone who knows the key can decipher your diary and read what you wrote.


        Cryptography isnt just about keeping secrets, though.

        What is cryptography?

        What is cryptography? - check

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        It also provides ways to ensure that a message hasnt been tampered with (integrity), to verify the senders identity (authentication), and to prevent someone from denying they sent a message (non-repudiation). (These are all vital components of secure communication in the digital age.)


        So, where do we see cryptography in action? Everywhere! When you shop online and see the little lock icon in your browser, thats cryptography at work, protecting your credit card details.

        What is cryptography? - managed service new york

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        When you send an email using a secure provider, cryptography is encrypting your message to prevent prying eyes. Even your Wi-Fi password uses cryptography to secure your home network. (Its truly ubiquitous, even if we often dont realize it.)


        From the simple substitution ciphers of ancient times to the complex mathematical algorithms used today, cryptography has evolved alongside technology.

        What is cryptography? - managed it security services provider

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        (And it continues to evolve, as cryptographers constantly work to stay one step ahead of those who would break the codes.) Its a fascinating field that plays a critical role in securing our digital world. Its more than just secret codes; its about trust, security, and privacy in an increasingly connected world.



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