To store your English papers, emails, and other documents containing letters, the computer first must convert the letter into a number. To do this, a system was created in the 1960's called ASCII (American Standard Code for Information Interchange) which assigns a decimal value to each letter. Here are the ASCII codes for uppercase letters A - Z:
Encrypt each letter of the five letter word BOARD by converting to a decimal value then encrypting using the RSA public key e = 13, n = 4757.
The encrypted message will be:
If the numbers are get too big for your calculator, try this online calculator.
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 |
Encrypt each letter of the five letter word BOARD by converting to a decimal value then encrypting using the RSA public key e = 13, n = 4757.
The encrypted message will be:
If the numbers are get too big for your calculator, try this online calculator.