（一）从销售方取得的增值税专用发票上列明的增值税税额；
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Blockchain allowed people to guarantee the fidelity and security of a record of data without the need for a third party to ensure accuracy.
Their new approach, which I'll call Linux ID, was presented this week by Linux Foundation Decentralized Trust leaders Daniela Barbosa and Hart Montgomery, along with partner Glenn Gore, CEO of Affinidi, an open-standard digital trust company. Linux ID is meant to give the kernel community a more flexible way to prove who people are, and who they're not, without falling back on brittle key‑signing parties or ad‑hoc video calls.