高华气象

CEO Blog

A virtual club to communicate with peers and users in the cryptographic industry
Meet friends on blog, it is my mission to popularize cryptographic knowledge, cryptographic application and zero trust ideas.

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    • What is LTV? How to make document digital signature valid for a long time?

    What is LTV? How to make document digital signature valid for a long time?

    This article clearly explains LTV and explains why Adobe Reader can display the LTV feature even if the document does not have a timestamp. It also explains clearly why ZT Browser changed the name of LTV with timestamp to "Strict LTV". Supporting LTV technology is a must for document digital signature.

    October 16, 2023Read more
    Document security needs to be “Visible”

    Document security needs to be “Visible”

    E-document readers have no way of knowing whether the identity of the document publisher claimed by the PDF document is authentic and trustworthy. How to do? ZT Browser PDF Reader has 5 innovative UIs to make documents security "visible". This article explains these 5 major innovations in details.

    October 11, 2023Read more
    All e-documents require zero trust

    All e-documents require zero trust

    All e-documents without digital signatures are not trustworthy, because anyone can easily create a PDF document that claims to be issued by someone or a certain organization. How to do?

    October 11, 2023Read more