计算机安全
計算機安全
계산궤안전
NETWORK AND COMPUTER SECURITY
2013年
1期
6-12
,共7页
图像融合加密%超混沌%位平面置换%按位取反%置乱程度%安全性
圖像融閤加密%超混沌%位平麵置換%按位取反%置亂程度%安全性
도상융합가밀%초혼돈%위평면치환%안위취반%치란정도%안전성
image fusion encryption, hyper-chaotic s, the Bit-plane displacement, the bit negation operations%the scrambling degree%security
为了提高图像加密算法的安全性和加密效率,提出一种新的基于超混沌映射的图像融合加密算法.首先,利用Chen超混沌系统产生四条混沌序列,并对这四条混沌序列进行取小数部分、矩阵相乘及取索引值等变形处理;然后分别利用变形后的混沌序列对原始图像和密钥图像进行像素的位置置乱,接着用交换位平面和按位取反操作来扰乱其像素值;最后,执行加运算可得到加密图像.置乱程度和安全性分析表明,该图像融合加密算法具有较好的加密效果,较大的密钥空间和较强的密钥灵敏性,且可抗抵抗穷举攻击和统计攻击.
為瞭提高圖像加密算法的安全性和加密效率,提齣一種新的基于超混沌映射的圖像融閤加密算法.首先,利用Chen超混沌繫統產生四條混沌序列,併對這四條混沌序列進行取小數部分、矩陣相乘及取索引值等變形處理;然後分彆利用變形後的混沌序列對原始圖像和密鑰圖像進行像素的位置置亂,接著用交換位平麵和按位取反操作來擾亂其像素值;最後,執行加運算可得到加密圖像.置亂程度和安全性分析錶明,該圖像融閤加密算法具有較好的加密效果,較大的密鑰空間和較彊的密鑰靈敏性,且可抗牴抗窮舉攻擊和統計攻擊.
위료제고도상가밀산법적안전성화가밀효솔,제출일충신적기우초혼돈영사적도상융합가밀산법.수선,이용Chen초혼돈계통산생사조혼돈서렬,병대저사조혼돈서렬진행취소수부분、구진상승급취색인치등변형처리;연후분별이용변형후적혼돈서렬대원시도상화밀약도상진행상소적위치치란,접착용교환위평면화안위취반조작래우란기상소치;최후,집행가운산가득도가밀도상.치란정도화안전성분석표명,해도상융합가밀산법구유교호적가밀효과,교대적밀약공간화교강적밀약령민성,차가항저항궁거공격화통계공격.
In order to improve the security of image encryption algorithm, we presented a new image fusion encryption algorithm. First, four chaotic sequences generated by Chen’s hyper-chaotic maps and we will intercepting fractional part, multiplying the matrices and taking the index value for these chaotic sequences. Secondly, using the chaotic sequences processed to scramble the locations of pixels from the original-image. Thirdly, carry out Bit-plane displacement and the bit negation operations to change the values of pixel. At last, adding the two obtained matrices to obtain the encrypted image. The scrambling degree and security analysis show that our algorithm can get good encryption effect, has widest secret key’s space, strong sensitive to secret key and has the ability of resisting exhaustive attack and statistic attack.
