Abstract: A method of performing cryptocurrency transactions requiring a private key includes: establishing a connection from a smart wallet to a user device; receiving a transaction request requiring the private key; disabling the connection; retrieving the private key to a private key memory; processing the transaction; clearing the private key memory; enabling the connection; and sending a completion message. A method of performing cryptocurrency transactions requiring a private key includes: establishing a connection from a user device to a smart wallet; receiving a transaction request requiring the private key; sending the transaction request to the smart wallet; determining that the smart wallet is disconnected from the user device; waiting for the smart wallet to reconnect; and receiving a response from the smart wallet. A smart wallet includes: a storage; a private key storage; and a communication module that is able to communicate with a user device across at least one channel.

Abstract: A low power internet of things (IoT) device includes: a power source; a controller coupled to the power source; a selectively enabled power converter coupled to the power source; and a selectively enabled communication module coupled to the power converter. An automated method of controlling a low power IoT device includes: monitoring a set of hardware triggers; determining whether a set of communication criteria has been met; enabling a communication module of the IoT device if the set of communication criteria has been met; and disabling the communication module after determining that communication has been completed. A low power IoT system includes: a low power IoT device including: a power source; a controller coupled to the power source; a selectively enabled power converter coupled to the power source; and a selectively enabled communication module coupled to the power converter; and a server.