计算机工程与应用
計算機工程與應用
계산궤공정여응용
Computer Engineering and Applications
2015年
21期
106-110
,共5页
多级混淆%网络编码%自然匿名%一种喷泉编码模式(LT)
多級混淆%網絡編碼%自然匿名%一種噴泉編碼模式(LT)
다급혼효%망락편마%자연닉명%일충분천편마모식(LT)
multistage confusion%network coding%natural anonymous%Luby Transform(LT)code
无线网络易于受到外界攻击,现有的匿名通信方案均无法满足资源受限的无线网络,网络编码的自然匿名特性能够较好地解决这一问题,但是其解码率很难控制。LT码的编解码特性可以有效控制可解码率,但是它对于多级传输过程无法适应。结合LT码和网络编码的思想,采用LT码的编解码方式,通过控制各节点编码包的度分布和对系数矩阵的重新构造完成再编码,完成多级匿名通信,使得信宿在解码时解码率接近1-δ。
無線網絡易于受到外界攻擊,現有的匿名通信方案均無法滿足資源受限的無線網絡,網絡編碼的自然匿名特性能夠較好地解決這一問題,但是其解碼率很難控製。LT碼的編解碼特性可以有效控製可解碼率,但是它對于多級傳輸過程無法適應。結閤LT碼和網絡編碼的思想,採用LT碼的編解碼方式,通過控製各節點編碼包的度分佈和對繫數矩陣的重新構造完成再編碼,完成多級匿名通信,使得信宿在解碼時解碼率接近1-δ。
무선망락역우수도외계공격,현유적닉명통신방안균무법만족자원수한적무선망락,망락편마적자연닉명특성능구교호지해결저일문제,단시기해마솔흔난공제。LT마적편해마특성가이유효공제가해마솔,단시타대우다급전수과정무법괄응。결합LT마화망락편마적사상,채용LT마적편해마방식,통과공제각절점편마포적도분포화대계수구진적중신구조완성재편마,완성다급닉명통신,사득신숙재해마시해마솔접근1-δ。
Wireless networks are vulnerable to outside attacks. Existing anonymous communication scheme is unable to adapt to the resource-constrained wireless networks. The natural anonymous characteristics of network coding are better able to solve this problem, but its decoding rate is difficult to control. The codec characteristics of LT codes can effectively control the decode rate, at the same time, it can’t adapt to multi-stage transfer process. This paper that combines thoughts of the LT code and network coding and uses encoding and decoding method of LT codes can complete the multistage anonymous communication and make the sink’s decoding rate close to 1-δwhen decoding by controlling the degree distri-bution of each node code package and restructuring coefficient matrix to complete coding again.