This can be a large problem, and is certainly less than convenient.Also does not protect sender from receiver forging a message and claiming is sent by sender, parties are equal. This means that you must either use a secure channel or meet in person in order to share this key.
So, to exchange keys you need a secure method of transmission, but essentially what youve done is create a need for another secure method of transmission. Keys must be exchanged before transmission with any recipient or potential recipient of your message. This has some drawbacks: If this key is disclosed communications are compromised - anyone who learns the method of encryption and gets the key, or a number or sequence of numbers or the sequences equivalent of numbers that are used as a random input into the encrypted system, can break the key. Rsa Decryption Key Calculator Code Messages Created.
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