RSA Encryption

You will find below a tool for performing the RSA Encryption. It can be used for both encryption and decryption as follows:

• Encryption: Enter your text in the box below. Press the button To Numbers to convert it to a string of 4-digit numbers. Enter the desired keys m and e into the boxes and press Encrypt/Decrypt . You will see a new string of digits which is the encrypted message. You can send this to someone by cutting and pasting it into an email message.

• Decryption: Enter the string of digits you wish to decrypt into the box and enter the decryption keys m and d in the appropriate fields. Press the button Encrypt/Decrypt and then press To Text.

Note that the label f is used for the window in which either e or d should be entered. The button Clear will clear the text window and the button Undo will undo the last thing you did.

You can use any letter, lower or upper case, spaces, periods and numbers in your message.

For instance, you could send email to me with the subject heading "Encrypted Message". My public keys are m = 8321 and e = 521 . Enjoy!