Crypto stack exchange one time pad

crypto stack exchange one time pad

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The one-time pad - Journey into cryptography - Computer Science - Khan Academy
When you use a one-time pad, we assume that your one-time pad contains perfectly random numbers, so the encrypted message is also perfectly. Use an initial one time pad created from a truly random source which is at least twice the length of any conceivable message that could be sent. One-time pad is a method where you XOR plaintext with the key. If the key is be random and not used more than one then the one-time pad is.
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  • crypto stack exchange one time pad
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Cryptocurrency difficulty meaning

Similarly, with symmetric cryptography, you should use one key for encryption and a separate independent key for message authentication. Then, take the entire ciphertext including any IVs, nonces, or other values needed for decryption , apply a message authentication code e. The LANMAN hashes would be hard to figure out if noone knew the algorithm, however once the algorithm was known it is now very trivial to crack.