MadelineProtoDocs/old_docs/API_docs_v100/constructors/securePasswordKdfAlgoUnknown.md

---
title: securePasswordKdfAlgoUnknown
description: Unknown KDF algo (most likely the client has to be updated)
image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
---
# Constructor: securePasswordKdfAlgoUnknown  
[Back to constructors index](index.md)



Unknown KDF algo (most likely the client has to be updated)




### Type: [SecurePasswordKdfAlgo](../types/SecurePasswordKdfAlgo.md)


### Example:

```php
$securePasswordKdfAlgoUnknown = ['_' => 'securePasswordKdfAlgoUnknown'];
```  


Or, if you're into Lua:

```lua
securePasswordKdfAlgoUnknown={_='securePasswordKdfAlgoUnknown'}

```