问题描述
目标是拥有一个NFC标签，该标签将提供一定的信息，保持解锁状态，并且仅允许经过身份验证的用户(登录/通过)更改该数据?有可能吗?
The goal is to have an NFC tag that will give a certain information, remain unlocked, and would only allow an authenticated user(login/pass) to change that data? Is that possible?
谢谢
推荐答案
是的，这是可能的.严格来说，您的问题可能与编程无关.但是与NFC相关的问题似乎倾向于模糊软件和硬件之间的界线，因此我仍然认为这是提出该问题的正确位置.
Yes, that is possible. Your question is, strictly speaking, perhaps not programming related. But NFC-related questions seem to tend to blur the line between software and hardware, so I still think this is the right place to pose the question.
NFC标签可以包含具有不同功能的不同芯片，具体取决于制造商.当您查看NFC论坛类型标签时，有以下选项:
NFC tags can contain different chips with different capabilities, depending on the manufacturer. When you look at NFC Forum Type Tags, there are the following options:
- 类型1标签:提供了锁定数据的可能性，但不支持身份验证AFAICT.原始制造商是Innovision Research&技术PLC，现在归Broadcom所有.
- 类型2标签:提供了锁定数据的可能性.有各种各样的制造商.某些芯片还提供身份验证和写保护，例如MIFARE Ultralight C.
- Type 3标签:基于Sony FeliCa技术，主要(唯一的)制造商是Sony. FeliCa芯片提供身份验证功能和写保护. FeliCa系统主要用于东亚.
- Type 4标签:基于ISO 14443-4和ISO 7816-4规范.提供指示写保护的可能性.支持此功能的芯片通常是微控制器卡，通常提供诸如身份验证，加密和写保护之类的高级功能，例如MIFARE DESFire系列芯片.
其他常用的NFC标签:
Other commonly supported NFC tags:
- MIFARE Classic:提供访问控制，包括写保护.还可以支持NDEF消息存储.
- 基于ISO 15693:某些芯片提供(有限的)身份验证功能和写保护，例如ICODE SLIX-S(还可以支持NDEF消息存储).
然后是JavaCard卡家族(通常与Global Platform兼容)和其他ISO 7816-4支持卡.它们通常提供文件系统和自定义程序等非常高级的功能，包括对身份验证，加密，数字签名的支持等.它们通常需要特殊的工具和培训才能使用它们.
Then there is the family of JavaCard cards (often Global Platform compliant) and other ISO 7816-4 supporting cards. These usually offer very advanced features such as a file system and custom programs, including support for authentication, encryption, digital signature, etc. They usually require special tooling and training to be able to work with them.
我建议您查看MIFARE Classic，如果不符合您的安全要求，则请查看MIFARE DESFire.
I would recommend looking at MIFARE Classic and, if that does not meet your security requirements, MIFARE DESFire.
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