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RSA algorithm
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RSA involves a public key and private key. The public key can be known to everyone; it is used to encrypt messages. Messages encrypted using the public key can only be decrypted with the private key. The keys for the RSA algorithm are generated the following way: Choose two different large random prime numbers {\displaystyle p\,} 
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elgamal encryption
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In cryptography , the ElGamal encryption system is an asymmetric key encryption algorithm for pragya@21 2018-07-16
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Chinese remainder theorem
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Let and be positive integers which are relatively prime and let 
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diffie hellman
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The Diffie-Hellman protocol is a method for two computer users to generate a shared private key with which they can then exchange information across an insecure channel. Let the users be named Alice and Bob. First, they agree on two prime numbers and , where is large (typically at least 512 bits) and 
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shift cipher
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In cryptography , a Caesar cipher , also known as Caesar's cipher , the pragya@21 2018-05-13
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