发布方会通过对其进行签名并且包含只有验证方才知道的公钥来保护令牌。

The Issuer will protect the token by signing it and by including a public key known only to the prover.

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验证方会在发布协议中随机生成公钥，此时会使用针对U - Prove令牌的相关私钥。

The Prover randomly generates it during the issuance protocol, together with a corresponding private key for the U-Prove token.

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与令牌的公钥不同的是，这个私钥并不是U - Prove令牌的一部分；验证方永远不会在使用u - Prove令牌的时候透露它。

In contrast to the token's public key, this private key is not part of the U-Prove token; the Prover never discloses it when using the U-Prove token.

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