 (computers). All data transmitted is encrypted when it is sent and decrypted at each node through which the data passes. All nodes along the transmission path must verify the data is not spam or fake in any way. Block Chain is made up of three main components: a network of computers, a protocol, and a way to reach consensus. www.TechnicalPDF.com Block Chain is envisioned for tracking assets and shipments, and for money transfers between banks. It is also the basis for digital cryptocurrencies. In tests of financial transactions between clearing houses, transactions that formerly took 3 days to complete, were done in just seconds. Other applications for Block Chain include tracking assets within organizations and payments between people and institutions; all can be completed without a central clearinghouse. Block Chain transactions and tracking are done through the use of a ledger, which has copies of all transactions and merchandise tracking steps. Each node (computer) in the chain of communications has a copy of the entire ledger and takes part in verifying each transaction. One challenge in implementing Block Chain is that all of the nodes in each transaction need to be based on compatible network operating systems, network protocols, and back-office systems. Cryptocurrency tokens that are used for financial transactions include Bitcoin, Zeash, Monero, Ripple, and Ether. Block Chain is architected in a mesh configuration with all nodes and institutions able to communicate with each other without a central entity managing the interactions. Each node verifies and authenticates the data as it is transmitted through networks. Platforms that use Block Chain operates on include Ethereum, Cardano, and Shuttle Fund. It's likely that there will be additional applications for Block Chain, which is a security protocol. It's not known what the future of cryptocurrencies is. www.TechnicalPDF.com Mounting Defenses via Firewalls Firewalls are used to screen incoming messages for known viruses, worms, and Trojan horses. Troja