Julia Magas, writing on CoinTelegraph, is concerned about the security of data held in block chain style data structures.
We are hearing, with increasing and disturbing frequency, about cloud servers that have been left open to attack by malicious or accidental agents. Millions and billions of records are being stolen from computer systems that may be as strong as Fort Knox, but a simple misconfiguration can lead to information being leaked out. See here for another 49 million records exposed in an Amazon Elasticsearch database:
So is block chain more secure? Is it a better way to store our personal and private information?
It may be a usefully secure infrastructure for long term storage of material that benefits from its very specific characteristics, but secure does not necessarily mean that personal data is suitably secured.
Julia's article analyses many of these considerations. In my view “secure” does not necessarily mean appropriately secured.
“Is it data stored on blockchain suitably anonymised? Would I want my passport visible to the world in a glass bank vault for the world to see? No. But I would probably enjoy the benefits of an encrypted version of my passport being held on the 'cloud' securely in this blockchain.”