42 Providing on-line non-downloadable software used to securely store, send, and receive digital currency and digital currency data and process transactions relating thereto; Providing temporary use of non-downloadable cloud-based software used to securely store, send, and receive digital currency and digital currency data and process transactions relating thereto; Electronic data storage, namely, providing a blockchain technology-based, distributed database ledger for the storage of public, private or encrypted data, transactions and information; Design, development, and implementation of software solutions for digital currency security, including but not limited to cryptocurrency and transactions involving cryptocurrency; Developing and updating of computer software for use in managing cryptocurrency and blockchain data