A blockchain is a growing list of records, called blocks, that are linked together using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. The timestamp proves that the transaction data existed when the block was published in order to get into its hash. As blocks each contain information about the block previous to it, they form a chain, with each additional block reinforcing the ones before it. Therefore, blockchains are resistant to modification of their data because once recorded, the data in any given block cannot be altered retroactively without altering all subsequent blocks.

Blockchains are typically managed by a peer-to-peer network for use as a publicly distributed ledger, where nodes collectively adhere to a protocol to communicate and validate new blocks.

One of the main advantages of blockchain is to establish a creditworthy ecosystem among independent participants in a non-trustable distributed environment.

In this assignment, you are required to develop a secure distributed application which utilized blockchain, examples of such applications include:

blockchain-based E-voting system

blockchain-based peer-to-peer ride sharing

Secure sharing of medical data

cryptocurrency transfer application

While developing your application, you need to apply the standards and secure programming principles.