From the course: Introduction to Quantum Cryptography
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Cryptography and keys explained
From the course: Introduction to Quantum Cryptography
Cryptography and keys explained
- [Instructor] When sending information from one computer to another via a network more often than not we want the message to travel securely and confidentially. That is, if someone who is other than the intended recipient intercepts it, that person will not be able to make sense of it. Converting a readable message called clear text to one that is unreadable called cipher text is the science of cryptography. Translated from Greek it literally means secret writing. For cryptography to work, Cleartext must undergo a process to make it Ciphertext. And an intended recipient needs a way to convert it back to Cleartext. Cryptography predates computing by thousands of years, so many creative mechanisms have been used. For example, it was a necessity of war, allowing generals to give commands via written notes to soldiers in the field while limiting the adversary from intel if the message was apprehended. A cheat sheet…
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