> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/actions/actions-description/group-code-flow/verify-message.md).

# Verify Message

Verify Message will use your Public Key to validate the message that was previously Signed.

Action available for the following operating systems:

![](/files/-MAlQBZuuTnc6hyzKSVQ)

### Parameters

* **Data Type** *\<numeric> -* Select the data type of your message
  * 1 - Text UTF-16 LE
  * 2 - Text ANSI/Binary
  * 3 - Text UTF-8
* **Source** *\<String> -* Select a Text, Variable or control to be Sign.
* **Signature** *\<String> -* Select a Text, Variable or control
* **Signature Encoding** *\<numeric>*
  * 1 - None (Binary)
  * 2 - Base 64
* **Target** *-* Select a Variable or Control
* **Algorithm** *\<numeric> -* Select the algorithm to be used:
  * 1 - RSA PKCS1 Padding
  * 2 - RSA OAEP Padding
* **Key** *\<string> -* Fill with a String, Control or Variable. **PublicKey** must be provided in X509Encoded format encoded in Base64 (with no headers/footers).

{% hint style="info" %}
For more information see Android documentation:\
<https://developer.android.com/reference/java/security/spec/X509EncodedKeySpec>
{% endhint %}

**Key Size** *\<numeric> -* Default value: 2048

{% hint style="info" %}
This is used to verify a message signature so that the authenticity of the message origin can be checked, it is not used decrypt messages!
{% endhint %}