A variant of the ZK proof, called the non-interactive zero-knowledge proof (NIZK) lets me do this in a single message from User to Issuer. Using this tool, I can build a credential system as follows:
Smetters, whose model is widely used in Washington D.C. to analyze the fiscal and macroeconomic effects of federal policy, has Beltway policy chops including a stint as an economist at the Congressional Budget Office and Deputy Assistant Secretary for Economic Policy at the U.S. Treasury. He has advised Congress on dynamic scoring, and consults with policymakers from both parties on major tax and spending legislation. Smetters has described PWBM as a “sandbox” for legislators to workshop economic policy ideas.
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(We’d also need to figure out exactly what the rules are for what can
FIND SORTED BY CREATED AT ACCOUNTS PAGES
（一）船舶共同海损牺牲的金额，按照实际支付的合理修理费，减除合理的以新换旧的扣减额计算。船舶尚未修理的，按照牺牲造成的合理贬值计算，但是不得超过估计的修理费。