Identity based encryption research work in communication
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Public-key cryptography offers very strong protection for electronic communications. Much of its strength comes from the use of paired keys, which are separate (but mathematically related) codes that encrypt and decrypt a message; one key is public and one is known only to the recipient.
But hardly anyone uses public-key cryptography, because it's too much trouble. The recipient has to be prepared with both public and private keys, and the sender has to know or be able to find the recipient's public key. In most cases, this means that the sender must query a certificate authority to retrieve the target recipient's public key. Although this is simple within a company, senders outside the organization don't have any access to a central directory, so it's more difficult for them to send encrypted messages. Moreover, the process works only if the recipient has already decided to use it and has made a key available. And most people don't have public keys.
But hardly anyone uses public-key cryptography, because it's too much trouble. The recipient has to be prepared with both public and private keys, and the sender has to know or be able to find the recipient's public key. In most cases, this means that the sender must query a certificate authority to retrieve the target recipient's public key. Although this is simple within a company, senders outside the organization don't have any access to a central directory, so it's more difficult for them to send encrypted messages. Moreover, the process works only if the recipient has already decided to use it and has made a key available. And most people don't have public keys.
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