# Ciphers and parameters

### Supported ciphers

#### Classical

* Substitution: Caesar, Atbash, Affine
* Polyalphabetic: Vigenère, Autokey, Beaufort
* Transposition: Rail Fence, Columnar

#### Modern

* Symmetric: XOR, AES, ChaCha20
* Asymmetric: RSA

### Parameters

| Cipher    | Parameters | Type | Notes             | Example          |
| --------- | ---------- | ---- | ----------------- | ---------------- |
| caesar    | `shift`    | int  | 0–25              | `shift=3`        |
| atbash    | None       | -    | -                 | -                |
| affine    | `a`, `b`   | int  | `a` coprime to 26 | `a=5, b=8`       |
| vigenere  | `key`      | str  | non-empty         | `key="SECRET"`   |
| autokey   | `key`      | str  | non-empty         | `key="KEY"`      |
| beaufort  | `key`      | str  | non-empty         | `key="KEY"`      |
| railfence | `rails`    | int  | >= 2              | `rails=3`        |
| columnar  | `key`      | str  | non-empty         | `key="KEY"`      |
| xor       | `key`      | str  | non-empty         | `key="SECRET"`   |
| aes       | `key`      | str  | password string   | `key="password"` |
| chacha20  | `key`      | str  | password string   | `key="password"` |
| rsa       | `key_size` | int  | 1024/2048/4096    | `key_size=2048`  |

### Input / output conventions

{% hint style="info" %}
Cipher Toolbox is educational. Text handling can vary by cipher. Check results with short known test vectors.
{% endhint %}

* Classical ciphers typically operate on letters.
* Some ciphers may drop or normalize whitespace and punctuation.
* `xor` ciphertext is hex.
* `aes`, `chacha20`, and `rsa` ciphertext is base64.
* AES/ChaCha20/RSA ciphertext varies per run.

### Security

{% hint style="warning" %}
Do not use this package to secure sensitive data. Use production-grade libraries instead.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://eadmiral.gitbook.io/cipher-toolbox/reference/ciphers-and-parameters.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.