目前大部分的群签名方案中，群公钥的长度和群成员数至少是线性关系，因此在群成员很多时，这类群签名方案很难适用。
In most group signatures, the length of group public key has linear relation with the number of group member at least, so it is hard to adopt such schemes when the number of group member is large.
这里提出了一种一次签名方案，它是一种对于签名生成和签名验证都极为高效的方案，而且签名长度很短，特别适用于组播通信的数据源认证。
We propose a one-time signature scheme with very efficient signing and verifying, and short signatures. Our scheme is well-suited for multicast source authentication.
在以往提出的环签名方案中，签名长度与环成员个数成正比，这是环签名的一个公开问题。
Most proposed ring signature schemes have the problem that the size of ring signatures depends linearly on the group size, that is an open problem.
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