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Cryptosystems like RSA works on numbers, but messages are made up of characters. How should we convert our messages into numbers so that mathematical operations can be applied?
The most common way is to take the ordinal bytes of the message, convert them into hexadecimal, and concatenate. This can be interpreted as a base-16 number, and also represented in base-10.
message: HELLO ascii bytes: [72, 69, 76, 76, 79] hex bytes: [0x48, 0x45, 0x4c, 0x4c, 0x4f] base-16: 0x48454c4c4f base-10: 310400273487
Convert the following integer back into a message:
pip3 install pycryptodome