How Are Prime Numbers Used in Cryptography?

Prime numbers form the backbone of many encryption algorithms, especially RSA (Rivest-Shamir-Adleman).

In RSA, two large prime numbers are multiplied together to create a public key. It’s nearly impossible to reverse the process and find the original primes—this makes hacking extremely difficult.


Prime Numbers in Cryptography – The Secret Behind Online Security


Real-Life Use Cases

  • Online banking

  • Secure emails

  • Digital signatures

  • Messaging apps encryption (like WhatsApp)


Why Prime Numbers?

Because:

  • They are unpredictable.

  • Factoring them takes enormous computing power.

  • They help in generating unique, secure keys.


Future of Cryptography

With the rise of quantum computing, newer algorithms may emerge, but prime numbers will remain fundamental for understanding digital security.


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