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I am prasad and i am very interested in cryptanalysis. I am...

<< Back to: Cryptography FAQ (01/10: Overview)

Question by prasad
Submitted on 1/15/2004
Related FAQ: Cryptography FAQ (01/10: Overview)
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I am prasad and i am very interested in cryptanalysis. I am confusing with keys.
what a public key and private key.Show one example for encryption technique.

Answer by Anitha
Submitted on 2/12/2004
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private key is the one which sender or receiver will be knowing but the public key is the one which everyone will be knowing.This is private and public key
sender will encrypt the message with private key and receiver will decrypt with public key
this is assymetric encryption Ex:RSA algorithm.
you go through some of the algorithms


Answer by ambi
Submitted on 2/17/2004
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cryptanalysis bole tho


Answer by Balu
Submitted on 6/27/2004
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Public key is used to encrypt the message.
Private key is used to decrypt the message.
The keys are strongly related.


Answer by ashu
Submitted on 3/28/2006
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A cryptographic system that uses two keys -- a public key known to everyone and a private or secret key known only to the recipient of the message. When John wants to send a secure message to Jane, he uses Jane's public key to encrypt the message. Jane then uses her private key to decrypt it.

An important element to the public key system is that the public and private keys are related in such a way that only the public key can be used to encrypt messages and only the corresponding private key can be used to decrypt them. Moreover, it is virtually impossible to deduce the private key if you know the public key.

Public-key systems, such as Pretty Good Privacy (PGP), are becoming popular for transmitting information via the Internet. They are extremely secure and relatively simple to use. The only difficulty with public-key systems is that you need to know the recipient's public key to encrypt a message for him or her. What's needed, therefore, is a global registry of public keys, which is one of the promises of the new LDAP technology.


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