接着提出了一个基于身份的可证明安全的群签名方案。
Then, we propose a provably secure and ID-Based group signature scheme.
在标准模型下设计高效可证明安全的签名方案具有现实意义。
To design a signature scheme which are efficient and provably secure in the standard model is suitable for applications.
在随机预言模型下，该方案在适应性选择密文攻击下是可证明安全的。
In the random oracle model, the scheme is provably secure against adaptive chosen ciphertext attacks.
该方案在随机预言模型下是可证明安全的，而且也是高效的方案，只需要一个对运算。
The scheme is provably secure in the random oracle model, and is an efficient scheme. It only needs one pairing operation.
对方案的有效性进行分析，将其与目前最新的在标准模型下被证明安全的签名方案进行比较。
The security of the signature scheme is reduced to the security of the q-SDH problem in the standard model. This paper analyses the efficiency of the signature scheme.
结果表明，在所用分组密码是伪随机置换的条件下，方案在分块适应性攻击模型下是可证明安全的。
Investigation shows that the scheme is provable security under the blockwise adaptive attack model if the underlying block cipher is a pseudorandom permutation.
与目前较新的在标准模型下已证明安全的方案相比，该方案具有较短的签名长度和更高的运行效率，且允许新成员的加入。
Compared with the latest schemes security in the standard model, this scheme has shorter length of group signature and higher operation efficiency, and it allows new members to join in the group.
药物只有在试验证明它们是相对安全的情况，且其益处大于风险时，才会被批准使用。
Drugs are only approved after tests have demonstrated that they are relatively safe when used as directed and when their benefits outweigh their risks.
有许多经过试验证明效果良好且安全的治疗方法。
There are a number of well-tried remedies which are perfectly safe to take.
如果经销商对FDA的权威提出质疑，FDA可以要求他们提供产品安全性和有效性的证明。
FDA can ask for the proof of safety and effectiveness of a product if its distributors challenge FDA's authority.
法默非常担心需要提醒公众注意糟糕的安全状况，到目前为止，事实证明他是对的。
Farmer is very concerned about the need to alert the public to poor security and, so far, events have proved him right.
赵东镐说，目前为止，所有的试验都证明，使用这项技术对人和机器都是安全的。
Cho says the technology has proven safe to use around people and machinery in all experiments so far.
如果你想要研发新药，那你必须证明新药的安全性，以及治疗某种疾病的有效性。
If you want to develop new drugs, you have to show that they are safe and effectively treat a disease.
欧盟要向莫斯科提供证明蔬菜安全的文件。
The EU is to provide Moscow with documents certifying the vegetables' safety.
萨维奇说：“我们开发这套复制软件系统是为了向人们证明钥匙本身并非就是安全的。”
"We built our key duplication software system to show people that their keys are not inherently secret," Savage said.
世界卫生组织(WHO)曾在去年提醒人们不要吸电子香烟，称没有证据证明其安全性，以及帮助戒烟的功用。
Last year the World Health Organization (WHO) warned against using electronic cigarettes, saying there was no evidence to prove they were safe or helped smokers break the habit.
西医包括了所有经严格科学试验证明的安全有效的治疗方法。
Western medicine embraces all approaches shown to be safe and effective in rigorous scientific trials.
装备了可扶持的柱子以及最快环道上的长椅，这种移动人行道被证明是非常安全的。
Equipped with posts to hold on to and benches along the fastest ring, the walkways had proved remarkably safe.
到目前为止，它证明是安全的。
如果这项送药技术能被证明可以安全的用于人体，那么未来老年痴呆症患者将会得到更有效的治疗。
If this delivery method proves safe in humans, then we may see more effective drugs being made available for people with Alzheimer's in the future.
但是，同时他认为在证明该过程的安全性上，依旧有很多工作要做。
But he also believes that a lot of work would need to be done to show that the process is safe.
世界自然基金会曾呼吁REACH应责令企业寻找危险化学品的替代物，即使企业能够证明这些化学物品的使用非常安全。
WWF had argued that REACH should oblige industry to find alternatives to hazardous chemicals, even when firms can show that they are being used safely.
然而，最近欧盟新通过的法案中要求日用化工品必须有使用安全的证明，这可能使得这一趋势一定程度上遭到逆转。
Recent European Union legislation requiring chemicals in common use to be proven safe to use, however, may yet reverse the trend.
60年的实践证明，安理会在解决事关世界和平与安全的重大全球和地区问题上具有不可替代的作用。
Practices in the past 60 years have proven UN Security Council has indeed had an irreplaceable role to play in resolving major global and regional issues bearing on world peace and security.
旅行者们得时刻注意：没有任何的安全机制能被证明100%安全。
Traveler's should always be aware: no security system is ever going to be foolproof and 100% secure.
虽然对这种行为趋势有一些警戒的声音，还是有很多人赞成这种做法，他们提供一些被证明了是安全的药物。
And while some expressed alarm over the trend, others embraced the idea, provided the drugs are proven safe.
如此小的应用程序可以直接记住，系统地、严密地加以考虑，以证明它们的安全性或可伸缩性。
Applications this small can fit inside a single human mind; it's possible to think about them systematically and rigorously, to prove their security or scaling profiles. Tiny Web servers include.
台湾卫生部已经要求厂商在周二前提供所有食品和饮料中所含乳化剂的质量和安全证明。
The Island's health department has requested quality and safety certificates to be provided for all food and beverages containing emulsifiers before Tuesday.
如果它是锁着的，证明网站是安全的，未锁的情况下，你就不能泄露自己的信用卡号码。
If it is locked, the site is secure, unlocked means that you should not give a credit card number.
相反，金融体系自身的安全措施，事实证明正是其弱点所在。
Instead, the system's own safety features turned out to be its weakest points.
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