> For the complete documentation index, see [llms.txt](https://coherence.3vidence.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://coherence.3vidence.com/poly1305.md).

# Poly1305

[Message Authentication Codes video](https://www.youtube.com/watch?v=DiLPn_ldAAQ\&index=22\&list=PL6N5qY2nvvJE8X75VkXglSrVhLv1tVcfy)

In order to understand *hex* and *type* parameters read [HASH](https://github.com/liesware/coherence/wiki/Hash)

## Poly1305

[spec](https://tools.ietf.org/html/rfc7539)

Description: Message authentication code based on block cipher.

Uses: Performance is important

Key size: 256 bits

Nonce size: 128 bits

## How to ???

```python
import requests
import json
import os,binascii

def sending(message):
    url = 'http://127.0.0.1:6613/'
    response = requests.post(url, data=message)
    print response.content
    return response.content

data_js='{"version":1,"algorithm":"POLY1305","type":"string","plaintext":"Hello world!","hex":0,"key":"0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF","nonce":"0123456789ABCDEF0123456789ABCDEF"}'
sending(data_js)
```

In this example we generate POLY1305 to hex string *Hello world!* with the key and nonce given.

Json to poly1035 string

```javascript
{"version":1,"algorithm":"POLY1305","type":"string","plaintext":"your string ",
"hex": BOOL,"key":"Hex string size=32,48,64","nonce":"Hex string size=32"}
```

Json to poly1035 file

```javascript
{"version":1,"algorithm":"POLY1305","type":"file","file":"your file","hex": BOOL,
"key":"Hex stringsize=32,48,64","nonce":"Hex string size=32"}
```


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