Intro to the One-Time Pad Cipher

4 years ago qvault.io

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Qvault.io – Coding courses to launch your tech career In cryptography, the one-time pad, or OTP is a way of encrypting information so securely that it’s impossible to be cracked. That said, OTP has a major drawback in that it requires both parties to have access to the same key before a message is encrypted.

In order to convert it back, all we need to do is XOR the ciphertext with the key and we’ll get the original message back.

That said, it only has perfect security if the following conditions can be met: The Caesar cipher is a great example of a cipher that is not perfectly secure or practically secure.

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