Question for digital design project

[Arwen148]

Hi, I am designing a circuit to perform Viginere encryption and I have a problem on how to provide the entrances to the circuit. I have to use a keyboard that transforms alpharithmetics to ASCII codes but the one design that I found is too large and too old. Does anyone have an idea on what to do???:|

 

[the_risk_master]

What algo or codes does a Vignene Encryption do? How many bits it used? and can you show your old design? May be we could help

(I'm very sorry for I don't know the algo of such encryption, perhaps just show some algo)

 

[Arwen148]

To understand Viginere encryption check out the following site:
**broken link removed**

since i will only be using it to encrypt letters it will need 7 bits for the ASCII code of each letter. I use d flip-flops to hold the key-word and then with a MUX deside which letter of the key should be used at each cycle. The problem is that the design for the keyboard ASCII-binary (and for the encoder)is too complicated to be a part only of a project and i was wondering whether there is another solution to use.