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。

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In this scheme, the key updating algorithm is used by the original signer, so the security of the proxy signature key is promoted to a higher level.

该方案将密钥更新算法应用在原始签名者计算过程中，更有效增强了代理签名密钥的安全性。

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Smart Card can effectively protect the information security because it can store and explain the private signature key and certificate, realize digital signature and authentication.

智能卡能够存储和解释私人签名密钥和证书，实现数字签名和认证，有效的保证信息的安全。

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Clinton said the two countries, which had frosty relations during the Cold War era and beyond, still differ on some key issues but that their new partnership has the potential to be a "signature accomplishment" of the two governments.

VOA: standard.2009.07.20

He says his signature on a key document was forged and he points out that all this allegedly happened before he became leader of the house.

BBC: NEWS | Americas | Brazil politician faces expulsion

Noda promised in August to call an election "soon" in order to secure opposition votes for another key piece of legislation - his signature sales tax increase plan designed to shore up state finances saddled by swelling social security costs.

MSN: Japan PM signals election can wait, defies opposition

While Rosen's voice echoes Corgan's, the band's signature off-kilter (at times off-key) melodies are more likely to bring to mind Flaming Lips frontman Wayne Coyne.

NPR: Falcon: 'The Sandfighter'