RSA Cipher Cat is an RSA public-key encryption tool.
Practically speaking, it is impossible to break messages encrypted with RSA cryptography. You can send messages without the worry of their being stolen.
How To Use Public-key Cryptography
You get a public key from one of your parties.
You encrypt a message with the public key.
You send the encrypted message to your party by e-mail or by any means you like. It doesn't matter if a malicious person sniffs your message. Even if he or she has the public key, he or she can never decrypt them. Public keys are for encryption only.
Only your party, who has the paired private key, can decrypt your message with "RSA Cryptographer Uncrackable".
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