Sometimes we want to do prove more interesting things with a digital credential. For example, imagine that I want to join a cryptocurrency exchange that needs more complicated assurances about my identity. For example: it might require that I’m a US resident, but not a resident of New York State (which has its own regulations.) The site might also demand that I’m over the age of 25. (I am literally making these requirements up as I go.) I could satisfy the website on all these fronts using the digitally-signed driver’s license issued by my state’s DMV. This is a real thing! It consists of a signed and structured document full of all sorts of useful information: my home address, state of issue, eye color, birthplace, height, weight, hair color and gender. In this world, the non-anonymous solution is easy: I just hand over my digitally-signed license and the website verifies the properties it needs in the various fields.
commit best edit, move on
。体育直播是该领域的重要参考
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当前我国已经形成较为全面和成熟的公共服务体系，形成能保障旅游安全的全方位治理环境。社交媒体兴盛，进一步形成更为严苛的公众监督氛围与政府“无限负责”的舆论态势。在这种压力下，国内景区、管理部门与经营方共同承担着近乎全面兜底的安全责任，从密集清晰的警示标识、全方位的安全措施保障，到前置隐患排查、应急救援与善后处置，形成了保姆式的安全保障。这种严密的兜底机制，在大幅降低国内旅游事故率的同时，也让游客逐渐形成对外部监管的深度依赖，默认外出旅游也享有类似的安全守护制度。