Importance

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Abstract

An electronic device may include: a communication circuit configured to communicate with an external electronic device, a display, a memory, and at least one processor electrically connected to the communication circuit, the display, and the memory, wherein the at least one processor is configured to operate a normal OS and a secure OS, and the memory stores instructions which, when executed, cause the at least one processor to control the electronic device to: receive a signature request message corresponding to a block chain through the communication circuit in the normal OS, drive block chain management software in response to receiving the signature request message, transfer the signature request message to the secure OS through the block chain management software, configure a user authentication request screen based on a trusted application being driven in the secure OS to output the user authentication request screen to the display, create a digital signature on the signature request message in the secure OS reflecting a private key stored in the memory in response to receiving a user authentication input for the digital signature, and transfer the digitally signed message to an application related to a block chain network in the normal OS through the block chain management software.

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First Claim