However, the security, efficiency or flexibility of most group signature schemes proposed at present, are not very ideal.

然而目前已提出的大多数群签名方案的安全性、效率或灵活性仍不够理想。

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This scheme that is constructed based on elliptic curve with one-time pair of keys has the merits of security, efficiency, smaller key and easy realization.

该方案是基于椭圆曲线，采用一次一密签名构造的，具有安全性高，速度快，密钥量小，便于实现等优点。

youdao

If the vehicle in the unfortunate circumstances of a collision, has to be able to maintain the security of the hydrogen which means more mass, which means a lot of the efficiency is being squandered What's the environmental impact of hydrogen production?

如果车辆,在碰撞中发生了不幸，要仍然能够保持氢气的安全性的话,意味着需要更多的质量，也就是说大部分效率被浪费了,制氢对环境有什么影响呢？

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Security efficiency varied from venue to venue and co-ordination had been a problem.

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Doll believes that if such platforms are comfortable with the security and efficiency benefits of its technology, then it will be easier for OneID to gain market share.

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"TSA has strict requirements that all vendors must meet for security effectiveness and efficiency, " the agency said in a statement.

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