What is Ardor
Ardor is a public blockchain platform that will allow people to utilize the blockchain technology of Nxt through the use of child chains.
A child chain, which is a ‘light’ blockchain that can be customized to a certain extent, is designed to allow easy self-deploy for your own blockchain. Nxt claims that users will "not need to worry" about security, as that part is now handled by the main chain (Ardor). This is the chief innovation of Ardor. The first child chain on the Ardor platform will be Ignis for which an ongoing crowdsale has been launched. Ardor also provides manageable blockchain size, which solves the problem of scalability by separating transactions and data that do not affect security from those that do, and moving all of those that don't affect security onto child chains.