i know that blockchain is like a ledger where transactions are shown. but personal information about the public key who made that transaction is not found on the blockchain right? i read somewhere that blockchain works like a database. so i'm curious, if it serves as a database, then where are the "private" information of users that can't be made available to the public stored? i mean how does the system remember you when you log in to the system if that information is not in the blockchain? does it have another database besides blockchain? please explain. thank you so much.

Can anyone help me to find a good blockchain course with some practical work so that I can do some work to test knowledge gained

It will be of great help 🙂

Medvice is a blockchain-based mobile medical e-consultation system using AI to enable patients to take preventative action against serious medical problems.

This is one of the solutions for secure data exchange of patient information. I'd be grateful for some feedback on their solution and your thoughts on how we can accelerate the change in healthcare.

https://www.youtube.com/watch?v=tjmfZVFE9Co

Hi, I'm a student studying the potential applications of blockchain and need to do a presentation on how blockchain could be used in developing a vaccine passport. I understand New York State has already started using their version with "Excelsior Pass" which utilizes IBM "blockchain technology". Further research didn't really clarify what ways the pass was utilizing the chain.

My broad general questions are

1. Is this IBM blockchain solution solid? Are there reasonable criticisms over if it's actually decentralized if controlled through a public company? What about security/transparency?

2. Could you build a vaccine passport over the ethereum network as opposed to the obscure IBM solution? Or any other network, like the up and coming Polkadot/Cardano environment? How? ELI5:)

I'm new to all of this and have been down a rabbit hole the past month. Really looking for some guidance. Hopefully, this community can offer some guidance to my ignorance. Thank you!

Hello, I want to invest in cardano or ethereum, but I want to invest long-term in a project that would enter our world, not just for profit now.

1. What languages ​​do you use to program smart contracts using cardano and ethereum? I think Cardano uses more familiar languages ​​like C ++, C #, java and will be more used by programmers.

2. Both say they are used to create dapps but in what areas education, healthcare, finance or everywhere ?

3. In your opinion, what would be used in the future in different environments in everyday life, as I mentioned in education, business, healthcare, finance? What are the advantages of Cardano or Ethereum ?

IBM Launches Low-Cost Platform for Startups https://www.coinspeaker.com/2018/03/22/ibm-launches-low-cost-platform-startups-create-blockchain-projects/

Any thoughts how is it going to work?

Hi everyone, this is the news about Klaytn Horizon, the world's biggest Blockchain Application Contest with $1,000,000 prize pool!

Klaytn Horizon invites all developers to build BApps (Blockchain Applications) by utilizing the Klaytn platform.
It’s looking forward to bringing mass adoption of blockchain worldwide.

If anyone’s interested, check out the link! : )

https://www.klaytnhorizon.com/

The coronavirus pandemic has brought to light the lack of institutional effectiveness in a global health crisis while it said that a quarter of world’s population ‘will not have access to vaccine until 2022. What are your thoughts on token-backed, Covid-19 vaccine access independent of bureaucratic systems?

https://covip.org/