| CPC H04L 9/50 (2022.05) [G06F 21/10 (2013.01); H04L 9/30 (2013.01); H04L 9/3247 (2013.01)] | 20 Claims |

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1. An electronic device comprising:
communication circuitry;
at least one processor comprising processing circuitry;
memory storing instructions that, when executed by the at least one processor individually or collectively, cause the electronic device to:
generate a public key regarding a first user of the electronic device and a blockchain address;
determine an external electronic device to share data;
transmit, to the external electronic device through the communication circuitry, an invitation message comprising information regarding the public key and the blockchain address;
based on a response message, received from the external electronic device in response to the invitation message, generate a blockchain network comprising the external electronic device as a node; and
store information regarding the blockchain network in an external server.
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