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1. Before encryption/decryption - set identical seed-string, as key:

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2. Customize alphabet (only unique allowed symbols):
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Shuffle alphabet, using CSPRNG (after set seed). Do not shuffle alphabet

Shuffled alphabet for encryption/decryption:

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4. Select cipher algorithm:
Reversive (one button for encrypt/decrypt): | Vernam | Shifted atbash | Beaufort | Atbash |
Not Reversive (two buttons for encrypt and decrypt): | Tritemius | Gronsfeld | Vizhener |

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3. Now you can encrypt message/decrypt cyphertext.

Type Letter:
(Clear Text/Cipher Text) In:	(CipherText/Clear Text) Out:
Show key Hide key Generated key:
Input Method: Single letter Block of text
Generate key Input key Key: