Auroracoin is a decentralised, peer-to-peer, and secure cryptocurrency released as an alternative to the Icelandic Króna to bypass governmental restrictions associated with the national fiat currency. It was launched with the aim of becoming the ‘official’ cryptocurrency of Iceland. AUR was a pioneer in the area of country-specific cryptocurrencies. AUR was launched on the 25th of January, 2014, by an anonymous developer who went by the pseudonym of Baldur Friggjar Óðinsson. It was originally based on Litecoin, using the Scrypt algorithm with a Proof of Work mechanism, but was later updated to use a multi-algorithm architecture in 2016, forked from DigiByte. Auroracoin uses the PoW consensus mechanism, which utilises device hashing power to solve a complex mathematical problem in order to authenticate a transaction proposed to be stored in the blockchain. The difficulty of solving the problem ensures that authenticating forged transactions is very difficult unless the attacker owns an impractically large chunk of the network’s total hashing power. AUR is one of the only cryptocurrencies to use a combination of five different hashing algorithms, namely Grøstl, Qubit, scrypt, SHA-256, and Skein. While initially very popular, Auroracoin has seen little to no activity for a while, with poor marketing, and frequent dev team changes. Reasons for little growth have been various, from slow adoption in Iceland, to developers leaving and joining the project midway. However, it is expected to not go lower than the recent low, and might see a rise as AUR plans to launch a more aggressive marketing campaign in Iceland to promote the coin among the masses. Unlike most other altcoins, Auroracoin has made extensive changes to the original codebase. It has introduced security measures such as Automatic checkpointing, and protecting against known flaws present in the BTC blockchain, such as 51% block replacement attacks.
Med Chain aims to create a new trading lifestyle of C2M through the decentralization, non-tamperable and traceability of blockchain, combined with the actual situation of the e-commerce industry, reducing the transaction cost of consumers and improving the production efficiency of manufacturers. Globalized peer-to-peer trading is integrated into every aspect of life, and everyone can trade and everything can be traded. Peer-to-peer trading lifestyle: Med Chain expects to popularize C2M trading models into people's daily lives through blockchain technology, open up trust barriers between consumers and manufacturers, reduce trust costs, and achieve peer-to-peer customized e-commerce transactions. Global e-commerce bottom-level public chain: Med Chain expects to use POS and DPOS consensus mechanism to establish a global e-commerce transaction public chain, establish a transaction credit system based on blockchain technology, product copyright traceability system, intelligent payment system, and transaction after-sales arbitration system. The open data system is open to global developers, allowing blockchain technology to serve all walks of life in e-commerce.