委付不得附带任何条件。委付一经保险人接受，不得撤回。
Chaum’s idea was to break the linkage between the issuance and usage of a credential. This means that when Alice shows her credential to the website, all the site learns is that Alice has been given a valid credential. The site should not learn which issuance flow produced her the credential, which means it should not learn her exact ID; and this should hold even if the website colludes with (or literally is) the issuer of the credentials. The result is that, to the website, at least, Alice’s browsing can be unlinked from her identity. Imn other words, she can “hide” within the anonymity set of all users who obtained credentials.
。爱思助手下载最新版本对此有专业解读
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Therefore, the default RSSI threshold of -75 dBm corresponds to about 10 to 15 meters in open space and 3 to 10 meters indoors or in crowded spaces. You got a good chance to spot that smart glasses wearing person like that.