With the rapid development of information technology, information security is gaining increasing concern. Digital signature has been in common use today.

随着信息技术的飞速发展，现代社会对于信息安全的要求也越来越迫切，数字签名技术已经在许多领域得到了广泛应用。

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"The security situation, the economic situation, the development situation in Afghanistan is a big concern for us, and you could look at this sort of as a canary and coal mine when you start seeing the numbers of Afghans moving further afield, " he said.

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