此挑战的另一部分是找到一种智能且可重用的方法来对文档进行分析，从文档中提取统计上相关的令牌，然后使这些令牌可用于Service Registry。
The other part of the challenge is to find a smart and reusable way to analyze documents, extract statistically relevant tokens from them, and make them available to Service Registry.
其中可能用到如使用公钥（PKI，Public Key Architecture）的智能卡，安全令牌，生物检测或多合一的技术手段。
This may include techniques such as PKI using smart cards, secure tokens, biometrics, or a combination of efforts.
我们不希望有让人们携带的令牌或智能卡。
We don't want to have to make people carry tokens or smartcards.
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