1·The Fail-stop signature is a very secure system, even though the attacker gains signature key, it is difficult to forge signature.
防失败签字是一种十分安全的签字体制，即使攻击者得到签字密钥后也难以伪造签字。
2·In the real world, we validate signatures by sight, even though a skilled attacker can reliably forge a signature that most people cannot distinguish from the original.
在现实世界中，我们通过视觉验证签名，即使如此，老练的攻击者还是可以伪造一个签名，大多数人都无法将它与原始签名区别开来。
3·Donald be forced to forge a signature.
唐纳德被迫伪造签字。
4·George was forced to forge a signature.
乔治被迫伪造签名。
5·A dishonest PKG could forge a valid partially blind signature.
不诚实的PK G可以伪造一个有效的部分盲签名。
6·This paper shows that Chen - Zhu's scheme is universally forgeable, that is, the group authority can forge a valid group signature on an arbitrary message, which stands in any group member.
该文认为该方案是全局可伪造的，群管理员可以对任何消息假冒任何成员生成有效的群签名。
7·Adversary can forge a valiad signature in any time by means of a known valiad signature.
敌手可以利用一个已存在的签名在任意时刻伪造一个合法签名。
8·The certificateless signature scheme can suffer from public key replacement attack so that any one can forge a valid signature on any message.
该方案能受到替换公钥攻击，以至于任何人都能对任何消息成功伪造签名。
9·Both original signer and signature receiver can forge a valid proxy blind signature for any file.
原始签名者或签名接受者能伪造任何文件的代理盲签名。
10·Forward security of the scheme means that even if the secret key of current time period is compromised, some security remains. It is impossible to forge the signature relating to the past.
方案的前向安全性保证了签名密钥可定期更新，即使当前时间段的签名密钥被泄漏，敌手也不能伪造先前的签名。