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If you have a TRULY random key (in binary) and you have a text (in binary) that you want to encrypt.

Can you simple XOR the key and the text?

Is that secure?

How secure?

Stefan
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1 Answers1

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XORing a key and message is called a one time pad. It is perfectly secure, providing confidentiality, when used correctly. That last part is the hard part, along with finding a situation in which you only need confidentiality.

Community
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Thomas M. DuBuisson
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