西北师范大学学报（自然科学版）
西北師範大學學報（自然科學版）
서북사범대학학보（자연과학판）
Journal of Northwest Normal University (Natural Science)
2015年
6期
50-53
,共4页
数字签密%前向安全%公开验证%椭圆曲线%改进
數字籤密%前嚮安全%公開驗證%橢圓麯線%改進
수자첨밀%전향안전%공개험증%타원곡선%개진
signcryption scheme%forward security%public verifiability%elliptic curves%improvement
指出张建航等提出的数字签密方案无前向安全性，提出了一个新的可公开验证和前向安全的数字签密方案，并进行了正确性和安全性分析，与已有方案比较，降低了算法复杂度。同时，指出张建航等提出的椭圆曲线数字签密方案复杂度过高，给出了一个新的签密方案，方案具有前向安全性和公开验证性，模乘运算达到最小值4次，模逆运算达到最小值0次，复杂度达到理论最小值。
指齣張建航等提齣的數字籤密方案無前嚮安全性，提齣瞭一箇新的可公開驗證和前嚮安全的數字籤密方案，併進行瞭正確性和安全性分析，與已有方案比較，降低瞭算法複雜度。同時，指齣張建航等提齣的橢圓麯線數字籤密方案複雜度過高，給齣瞭一箇新的籤密方案，方案具有前嚮安全性和公開驗證性，模乘運算達到最小值4次，模逆運算達到最小值0次，複雜度達到理論最小值。
지출장건항등제출적수자첨밀방안무전향안전성，제출료일개신적가공개험증화전향안전적수자첨밀방안，병진행료정학성화안전성분석，여이유방안비교，강저료산법복잡도。동시，지출장건항등제출적타원곡선수자첨밀방안복잡도과고，급출료일개신적첨밀방안，방안구유전향안전성화공개험증성，모승운산체도최소치4차，모역운산체도최소치0차，복잡도체도이론최소치。
T he signcryption scheme proposed by Zhang Jian‐hang et al is analyzed , and the scheme don’t have the forward security . An improvement scheme is proposed with public verifiability and forward security , the correctness and security are proved . The efficiency of the scheme is increased significantly compared with two existing schemes . Moreover , a new signcryption scheme based on elliptic curves is proposed with public verifiability and forward security . In the algorithm , both the numbers of model multiplication and model inverse are reached the minimum four times and zero times , the efficiency of the algorithm is increased significantly compared with the existing signcryption scheme .
