Data signature needs to be calculated from the MD5 digest of a string containing the ID, name and API Key (in that order) separated by commas.
Let's assume these are your variables:
You can calculate the signature using the following code:
Lastly, enable the security setting: "Enable Data Signature Validation?" from Admin Panel -> Settings -> Authentication -> Security.
By enabling the Domain Authentication setting, you can restrict the AtomChat Access to a particular domain.
Perform the following steps to Enable Domain Authentication/Mapping