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4ヶ月前

Quantum Computing and Identity Assurance

Hitoshi Kokumai · Bad guys, who have a quantum computer at hand, would still have to break the part of user authentication that is not dependent on the public-key scheme, prior to accessing the target data, in the normal environment where secret credentials play a big role; quite a few cryptograph ...

4ヶ月前

New Slide - Healthy Second Life of Legacy Password Systems

Hitoshi Kokumai · We’ve come up with a slide presentation for “Bring a healthy second life to your legacy password system” · “We do not have to replace or rebuild the existing text password systems for making use of episodic memory; images of our episodic memory can be turned into a high-entropy c ...

8ヶ月前

Episodic Memory and Blockchain

Hitoshi Kokumai · What blockchain technology aims to achieve was not new to us. It was in 2002 that we took on a project that Expanded Password System was incorporated in a private/public key scheme deployed in a decentralized P2P formation. We were not able to secure the further budget for comme ...

8ヶ月前

Blockchain not to blame

Hitoshi Kokumai · "Bitcoin is ‘disgusting and contrary to the interests of civilization’ says famed investor Charlie Munger"   https://www.theregister.com/2021/05/03/berkshire_hathaway_annual_meeting_tech_highlights/ · I don’t think that this report is the denial of blockchain and the like, althou ...

8ヶ月前

Blockchain and Carbon Footprints

Hitoshi Kokumai · "Could a ‘Crypto Climate Accord’ erase cryptocurrencies’ carbon footprint?"   https://www.theverge.com/2021/4/8/22373524/cryptocurrency-climate-accord-bitcoin-carbon-footprint · Is the carbon footprint of blockchain an enemy of the habitable climate? · We should distinguish the ...

9ヶ月前

Blockchain could be relied upon only when it comes with solid identity assurance

Hitoshi Kokumai · Blockchain is catching eyes of a number of defense people as reported in “America and its military need a blockchain strategy”  https://www.c4isrnet.com/opinion/2021/04/05/america-and-its-military-need-a-blockchain-strategy/ · People who promote blockchain-applied technologies a ...

2年前

Threat to Self-Sovereign Identity

Hitoshi Kokumai · Expectations appear to be rising for ‘Blockchain’ that supports the schemes of ‘Self-Sovereign Identity’ and ‘Bring Your Own Identity’. · A good vault needs not only a tough gate panel but a reliable lock system. The blockchain technology could indeed help make the strong gate p ...

3年前

Blockchain solutions offered without a reliable user authentication don’t make much sense, do they?

Hitoshi Kokumai · When we say ‘This door is weak’, it could mean ‘The door panel is weak’ and ‘The lock/key system is weak’.  The blockchain technology could indeed help make a strong door panel, but it alone could never make a substitute to a reliable lock/key system. · Well, for the most reliab ...

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