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How to get any device ID that will authenticate and validate in REST web service for particular web service.

I can not use IMEI or MAC for storing in server and authenticate hex string .I found about Secure Android ID but it has wide range ,if phone will Reset/Factory wiped and Android ID will reset.Also credentials(Login/Pass/User Name etc.) not usable for this.

I want to store one Hex-string(64 or 128 bit) which can be validate during only SignIn/SignOut scenario without credentials authentication.

Harsh Bhavsar
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You can send session id generated on server side in each API, when that user try to connect again you can validate that session id. You have to send session id in every API and you can validate that either server side or client side.

Tushar Patil
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