Microsoft + Bitcoin Lightning Network. Decentralized Identity proof of concept to be shown off at Consensus 2018. Seems big

I'm not sure why this is flying under the radar. This seems extremely bullish for bitcoin.

At the Consensus event – Wednsay 16th at 9:10am Microsoft will be presenting the following:

"DECENTRALIZED IDENTITY FOR A DECENTRALIZED WORLD

Empower users to own and control their Identity. In this session Microsoft, along with Sovrin, Blockstack and uPort will share why we need Decentralized Identity. We will share proof of concept from first set of proposed standards and challenges ahead with a decentralized identity experience for everyone and everything."

The idea behind this is for people to own their own identity (and property) information rather than having corporations holding your details and having to verify every user. This is an extremely big industry and costs user and corporations heaps in security, verification processes, customer service etc..

I believe this is going to be built [primarily] on the bitcoin lightning network. Microsoft have already released the following:

"To support a vast world of users, organizations, and devices, the underlying technology must be capable of scale and performance on par with traditional systems. Some public blockchains (Bitcoin [BTC], [E TH], [L TC], to name a select few) provide a solid foundation for rooting DIDs, recording DPKI operations, and anchoring attestations. While some blockchain communities have increased on-chain transaction capacity (e.g. blocksize increases), this approach generally degrades the decentralized state of the network and cannot reach the millions of transactions per second the system would generate at world-scale. To overcome these technical barriers, we are collaborating on decentralized Layer 2 protocols that run atop these public blockchains to achieve global scale, while preserving the attributes of a world class DID system."

Source: https://cloudblogs.microsoft.com/enterprisemobility/2018/02/12/decentralized-digital-identities-and-blockchain-the-future-as-we-see-it/

Clearly bitcoin is way ahead with second layer solutions (lightning network) and will therefore be the strongest candidate to run this system.

Verifying this, the lead microsoft developer, Daniel Buchner, tweeted this morning;

"I was intro'd to Bitcoin in early 2011 by a good friend at Mozilla. That year I started working on a proposal called Firefox Handshake, a vision for decentralized apps/comms based on Bitcoin-anchored decentralized IDs

Now, in May 2018, we're at the tipping point of inevitability"

source: https://twitter.com/csuwildcat/status/995796810827517952

When Microsoft releases this on the bitcoin network it will boost community and institutional confidence that bitcoin is still the leader in crypto development and has the strongest and most distributed blockchain.

Daniel's tweet hints that this system is close to being released

TLDR: Microsoft will soon release a decentralized identity system which will likely be built on the Bitcoin Lightning Network.

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How to compute double sha256 shown in examples of bip 143?

How do I compute the double sha256 shown in example of bip 143?

The example in Native P2WPKH

  hashPrevouts:      dSHA256(fff7f7881a8099afa6940d42d1e7f6362bec38171ea3edf433541db4e4ad969f00000000ef51e1b804cc89d182d279655c3aa89e815b1b309fe287d9b2b55d57b90ec68a01000000)      = 96b827c8483d4e9b96712b6713a7b68d6e8003a781feba36c31143470b4efd37 

I tried

  export $  PREV_OUT=fff7f7881a8099afa6940d42d1e7f6362bec38171ea3edf433541db4e4ad969f00000000ef51e1b804cc89d182d279655c3aa89e815b1b309fe287d9b2b55d57b90ec68a01000000   echo -n $  PREV_OUT |openssl dgst -sha256 -binary |openssl dgst -sha256 

This is what I am getting

  cf4cff3b2196ae87636af6088736f0f9102106375f306c032804845a2d3b92d4 

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