I agree that we need to distinguish
a) identity privacy from
b) transaction content privacy
and it depends on the purpose of the blockchain and the kind of transactions that you want to use on the blockchain.

For instance, if you just want to transfer a token (such as bitcoin), you don't need to actually hide the amount of tokens transfered (even though that would be very well possible, such that only sender and receiver can figure out the actual amount).
But, as described in the other mail, if you want to put a decentralized exchange or a bond market on a blockchain, you NEED to hide prices/amounts to not be the victim of
people that misuse the information to cheat your 'orders' .. such as short orders or loans in a bond market.

Another use case wold be health insurance. You can put your health data in a public blockchain, but you want that only your doctors are able to decrypt it and not everyone else.

All of what I said above is technologically feasible today.

Cheers
 -- Fabian

On 02/12/2016 03:59 PM, Duc.M.Trinh@... wrote:

Is the goal to support anonymity (from an identity perspective) or is the goal to mask the actual contents/value of your transactions?  IMO, the former is a reasonable requirement.  However, the latter seems contradictory to the original purpose of the blockchain.

--

*Fabian Schuh* / Business Developer, Technical Consultant
fabian@... <mailto:fabian@...>


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