Answer Posted / supriya
cryptography is basically an art of manipulating messages to
make them secure.
cryptography is basically used decrypt the message by using
some key that is and plain text is converted in cipher text
it is mainly used for security
u can take an example in which
Alice wants to transmit a megs to bob the data or message is
confidential...
and a intruder reads the message the at this place if the
message was encrypted the message would not be read by the
intruder and so the need of cryptography arised
2 types of cryptography
symmetric and asymmetric key cryptography
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