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Editorial Team
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Asked: 2026-06-11T20:34:27+00:00

A link will be provided for the WebSiteA to WebSiteB We are not able

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  1. A link will be provided for the WebSiteA to WebSiteB
  2. We are not able to code anything in WebSiteA
  3. I need to pass a token from WebSiteA to WebSiteB (In order to understand the user is coming from WebSiteA)
  4. Can’t use Request.UrlReferrer to identify previous site since WebSiteA is HTTPS
  5. Query string is insecure because of replay attack (If any outside get the url it can be re-used)
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  1. Editorial Team

    I would personally use an encrypted POST variable which get’s POST’ed to WebSiteB.

    WebSiteB then decrypts this with the private key.

    Optional validation: WebSiteA has a (HTTPS?) webservice, which WebSiteB then checks with the decrypted key to validate / get more information from WebSiteA for that same request.

    Some encryption / decryption techniques here: Encrypt and decrypt a string

    This way it’s secure and can be checked if it’s trying to be spoofed etc…

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