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cryptography and network security by atul khare 2nd edition pdf free download

Cryptography, which is translated as "secret writing", means the science of concealing the meaning of the data, so only the specified parties understand that the content of transmission cryptography has existed for thousands of years; For most of the history, however, users of cryptography were connected to a government or organized group and were working to hide secret messages from enemies. These days, millions of secure, encoded transmissions are online every day - and cryptographic standards are used for banking data, health related information and more. Without cryptography, like e-commerce we know that it will be impossible because online security threats are not only for governments but also for business and end users, they are developing rapidly, to make the best use of encryption for security There are many different schools for.