Appian Sites: How to Navigate to a Site Page from an External Application/Website with Encrypted URL Parameters

Business need: When a user is working in an external application with a record open and clicks a link within that record, the system should securely transfer certain parameters from the record to Appian and automatically open the corresponding page in Appian, allowing seamless navigation without requiring the user to re-enter the data in Appian. Additionally, the sensitive parameters passed from the external system to Appian must not be exposed in the URL. Is there a way to achieve this? Thanks in advance.

Note: User has privileges to access both the applications.

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