| CPC H04L 9/0866 (2013.01) [G06F 3/017 (2013.01); H04L 9/3231 (2013.01); H04L 9/40 (2022.05)] | 18 Claims |

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1. A method of exchanging data between devices, the method comprising:
by a first device:
detecting an intention of a user to transmit data;
generating, by using biometric data obtained from the user, a first private key and first identification information for the data;
encrypting the data by using the first private key, wherein the first private key is deleted after encrypting the data; and
transmitting the encrypted data and the first identification information to a personalized cloud storage; and
by a second device:
detecting an intention of the user to receive the data;
generating second identification information by using the biometric data obtained from the user;
requesting the personalized cloud storage for the data by using the second identification information; and
receiving and storing the data from the personalized cloud storage.
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