Affine Cipher
Encrypt and decrypt messages with the Affine substitution cipher using custom key values.
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Ctrl / ⌘ + Enter to runOverview & Practical Applications
Encrypt and decrypt messages with the Affine substitution cipher using custom key values.
Input reference
| Field | Example input |
|---|---|
| Text | HELLO WORLD |
| Key A | 5 |
| Key B | 8 |
| Mode | encode |
Common questions
What does Affine Cipher do?
Encrypt and decrypt messages with the Affine substitution cipher using custom key values.
Does the tool work online without an account?
Yes. The page is designed for quick browser-based use without requiring a sign-up flow.
What happens to my input?
Inputs are sent to our server to calculate your result. File tools use temporary processing storage, cleaned up after each request. We do not offer permanent file storage. Avoid uploading sensitive documents.
Do I need an account or subscription?
No. The tools on this website are free to use without registration. Advertising may support the service.
Privacy policy
Inputs are sent to our server to calculate your result. File tools use temporary processing storage, cleaned up after each request. We do not offer permanent file storage. Avoid uploading sensitive documents.
Privacy policy →