<<
My concerns are around Information Governance.  In this article posted by 
Gary, and the only one I have read on the technology, the writer 
illustrates how information is duplicated and distributed across the 
entire permitted environment.  Haven't we seen this before?

Think about paper in organizations that had no centralized Records policy. 
 Everyone made copies of anything they deemed important.  This was because 
they didn't trust the system.  Nor should they.  If I had a document and 
thought I might need it again I would make a copy before I sent the 
original on to the next stage in the process.
>>

David,

I'm not sure, because I have an imperfect understanding to say the least, 
but I don't think the actual data is what resides everywhere, (although 
the article does say that). I think what resided everywhere are hashes, 
which are kind of validation/date stamps. See this article:


"Since storage in blockchains is permanent, and storing large amounts of 
data on a blockchain is not economical, the practical way to store data on 
a blockchain is to store a fixed (and normally smaller) size 
representation of the data called the ?hash of the data.? One use for a 
blockchain is as a timestamping service. Suppose there is a picture that 
you wanted to prove currently exists, and is not fabricated in the future. 
You could store the picture in the blockchain now, and a year later, if a 
judge asks if the picture was really taken a year ago, you could show it 
on the blockchain. But, since you know about hashes, you hash the picture 
and store the hash on the blockchain instead. When the judge asks for 
proof, you provide the picture, then the judge can hash the picture and 
compare it against the hash that you stored on the blockchain."

"Secure cryptographic hash functions are one-way, fast to compute, and 
collision resistant. Combined with the property that they process any type 
of input to produce an output of fixed-size, called a hash, hashes are 
very useful as an identifier for any data. Hashes of length 256 bits 
represent an astronomical number of combinations, that they are more than 
enough to be a globally unique identifier for the Internet of Things, even 
at the scale of nanotechnology and beyond. And these hashes can be written 
as 64 characters (hexadecimal), which make them practical enough to use as 
identifiers. In blockchains, hashes are used as identifiers for blocks, 
transactions, and addresses."

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Gary





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