计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2010年
9期
80-82
,共3页
门限群签名%特权集%伪造攻击%合谋攻击
門限群籤名%特權集%偽造攻擊%閤謀攻擊
문한군첨명%특권집%위조공격%합모공격
threshold group signature%privilege subsets%frogery attack%conspiratorial attack
针对冯登国提出的"存在特权集的门限群签名"问题,2005年,陈伟东提出了一类存在特权集的门限群签名方案(C-F方案),分析发现它容易受到可信密钥认证中心发起的三种伪造攻击,不具有签名的可区分性和事后身份追踪的特性,也无法抵抗内部成员的合谋攻击.提出了一种改进方案,新方案克服了C-F方案的安全隐患,保护了签名人的合法权益,节省了系统存储空间,是一个安全有效的签名方案.
針對馮登國提齣的"存在特權集的門限群籤名"問題,2005年,陳偉東提齣瞭一類存在特權集的門限群籤名方案(C-F方案),分析髮現它容易受到可信密鑰認證中心髮起的三種偽造攻擊,不具有籤名的可區分性和事後身份追蹤的特性,也無法牴抗內部成員的閤謀攻擊.提齣瞭一種改進方案,新方案剋服瞭C-F方案的安全隱患,保護瞭籤名人的閤法權益,節省瞭繫統存儲空間,是一箇安全有效的籤名方案.
침대풍등국제출적"존재특권집적문한군첨명"문제,2005년,진위동제출료일류존재특권집적문한군첨명방안(C-F방안),분석발현타용역수도가신밀약인증중심발기적삼충위조공격,불구유첨명적가구분성화사후신빈추종적특성,야무법저항내부성원적합모공격.제출료일충개진방안,신방안극복료C-F방안적안전은환,보호료첨명인적합법권익,절성료계통존저공간,시일개안전유효적첨명방안.
Feng Deng-guo suggests a problem called threshold group signature scheme with privilege.In 2005,Chen Wei-dong presented a group of threshold group signature schemes with privilege subsets.Through cryptanalysis of it,KAC or KAC with others can froge signature,and it is not provided with distinguishability and traceability.Furthermore,it can not resist conspiratorial attack.An improved scheme is proposed and the security drawbacks of original scheme are overcome.In the new scheme,the interests of signer are protected and storage space is reduced,so it is more secure and efficient.
