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Hi VL! It sound like you're on the right track in your solutions. - We do have a proxy available that may be helpful - Additionally, there's also an edge worker that may also fit your needs - Remote evaluation, which works with the proxy/front-end SDK, evaluates feature flags only on the server and avoids sending any private data - One final feature to know about is secure attributes. They offer some level of obfuscation of attribute values. I know that's a lot! Please let me know if you have other questions.

Thanks, Actually we are already using proxy, but seems its not a solution. Remote Evaluation could be, but I don’t understand how to use it right. So again: is there a way frontend WILL NOT init growbook with any attributes anywhere? But when frontend init - growthbook will go to our backend and asks for attributes for the specified user is trying to init?

You can init GrowthBook with your own set of attributes. However, these attributes need to be present because they are how GrowthBook determines the value of feature flags/experiments.