Based on the key distribution, cryptography is further classified into two major types-Symmetric Key Cryptography and Asymmetric Key Cryptography. Cryptography is one such technique, which allows secure data transmission without losing its confidentiality and integrity. The basic factor is, how much security, the channel provides while transmitting data. The amount of data, transferred, is not a factor. For this, many technological implementations and security policies have been developed. Attempts have been made to remove various insecurities over internet. Network security is an important aspect of information sharing.
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