A Formal Method for Analyzing Electronic Commerce Protocols

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1 /2005/16(10) Journl of Softwre Vol16, No10 1,2+ 1 (, ) 2 (, ) A Forml Method for Anlyzng Electronc Commerce Protocols QING S-Hn 1,2+ 1 (Engneerng Reserch Center for Informton Securty Technology, Insttute of Softwre, The Chnese Acdemy of Scences, Bejng , Chn) 2 (Bejng ZhongkeAnsheng Corporton of Informton Technology, Bejng , Chn) + Correspondng uthor: Phn: , Fx: , E-ml: qshn@ercstscsccn Receved ; Accepted Qng SH A forml method for nlyzng electronc commerce protocols Journl of Softwre, 2005,16(10): DOI: /jos Abstrct: A forml method whch cn be used to nlyze securty propertes such s ccountblty nd frness n electronc commerce protocols s presented Compred wth the prevous work, the mn contrbutons re the followng Frstly, forml defnton s gven to the possesson set of ech protocol prtcpnt, nd the ntl possesson set depends only on the envronment Secondly, the set of ntl stte ssumptons s dvded nto three ctegores: bsc ssumptons, trust ssumptons, nd protocol comprehenson ssumptons, n order to vod nlyss errors cused by nforml ntl stte ssumptons Thrdly, the set of trust ssumptons s rtculted by forml specfcton t lower level of grnulrty, exposng the essence of the protocol Fourthly, estblshng n xom system mkes the new pproch more rgorous nd expressve ey words: forml nlyss; electronc commerce protocol; ccountblty; frness; TTP :,,, :(1), ;(2) 3 :, ;(3), ;(4), : ; ; ; ; : TP309 : A Supported by the Ntonl Nturl Scence Foundton of Chn under Grnt Nos , ( ); the Ntonl Grnd Fundmentl Reserch 973 Progrm of Chn under Grnt NoG ( (973)); the Bejng Nturl Scence Foundton of Chn under Grnt No ( ) : (1939 ),,,,,

2 1758 Journl of Softwre 2005,16(10),, PI,,, [1,2],, BAN [3] BAN [4] BAN,,,,,,,,,, BAN,,,,lr [5],, lr,,lr [6] [7] lr,,,, :(1), 8 (2) (3), 3 :, (4) TTP, (5) 1 : 1, 2,, 3 TTP, 4, 1~ 3,,,, 4,,, 11 (n): m n ; : A, A A ; ~ :, ~ =, ~ = : m EOO(evdence-of-orgn):,, EOR(evdence-of-recept):,, f X :,,, f EOO EOO, EOO

3 : ,, : Envronmen t = Prncple, Chnnel Pr =, A,,Q,R,,,,,, TTP, TTP,,,,TTP,, 122 ncple { TTP, A, C,, P, Q, R, }, : A B : m A B m A B : m A B m, A B m:(1) ftp B m ftp Zhou Gollmn [8],, TTP ftp, (2) B m,a B m, :() B m;(b) B m 123 n,a, A O,A O, O = O n A,A A, A, O = O n A, 1 m,m m M, m ˆ M ; ( m M ) (( m = ( m 1, m2)) ( m1 ˆ M ) ( m2 ˆ M )) ((( m = m1 ) ( m = m2 )) (( m 1, m2 ) ˆ M )) (( m = f ( m1,, mn ) ) ( m1 ˆ M ) ( m2 ˆ M ) ( m n ˆ M )),f, 2 m,m Mˆ M, 3 A Mˆ = { m m ˆ M} n A O ( = 0,1,, n ) O Ô,, Ô O, O Ô, A O 1 O ( (1) A B : m,m A, = 1,2,, n ), : 1 m O, 1 O = { O 0, = 1,2,, n

4 1760 Journl of Softwre 2005,16(10) 1 ˆ O m A, : m 1 (2) B A: m, A B : m, m O, 1 O = O { 1 (3), O = O, = 1,2,, n 13, = 1,2,, n 8 : (1) A Cn Prove x : A, B x, B y x (2) A Clms x :A x( x ), : A Clms ( x, y) A Clms x,, A (x,y), A x (3) A Controls x :A x, A x (4) A Hs m :A m (5) A Receved m :A m, : A Receved ( n) A Receved m,, A ( m, n), A m (6) P ( A, ) : A, A (7) A Fetched m :A m (8) A Generted m :A m : ( ϕ ) ( ( ϕ ψ )) ψ, ϕ ( ϕ ψ ) ψ, Γ ϕ Γ ( ) ϕ ϕ ϕ, ϕ, : ϕ, ϕ ψ, ψ 8 : A1 A CnProve x A CnProve y A CnProve ( x y) A x y, A A2 x y A CnProve x ( x y) A CnProve y A x, x y, A y A3 { ) A CnProve P( ) A CnProve ( B Clms ) ( A Hs 1 m A A B, A B m A4 A CnProve ( B Controls x) A CnProve ( B Clms x) A CnProve x A B x, A B x, A x A5 A CnProve ( B Clms { ) A CnProve ( B Clms ) A CnProve ( B Clms A B {, A B, A B m

5 : 1761 A6 A Receved m A Fetched m A Generted m A Hs m A A A A m A7 ~ A Receved{ A Hs A Receved m A { m }, A ~, A m A8 ~ A Fetched{ A Hs A Fetched m A { m }, A ~, A m 15 3 (1) () ; () () ; (b) ; (c) ; () EOO EOR; (2) () ; () EOO EOR ; (),,, EOO Ob EOR O ; (3), ( 1 n), EOO O b EOR O 2 21 CMP1 1995,Deng [9], CMP1 CMP 2 CMP1 CMP2, CMP2, CMP1, CMP1, X400, (1) A B : A, TTP,,{ k}, {{ A, } ttp k (2) B TTP :{ A, TTP,, { k}, {{ A, } ttp k b (3) TTP B :{{ A, } k ttp (4) TTP A :{{ A, TTP,, b k ttp,a { A,, k, k A,A m, k TTP, (1) B, (1), A,TTP,, md md,b : A B TTP, B, TTP m (1),B B, (1),

6 1762 Journl of Softwre 2005,16(10), B, B b md, (1) TTP (2),TTP B B md,ttp b k}, k,ttp k {{ A, 1} k, A, 1, A { ttp { A,TTP A, 1 m, { A, TTP, {, TTP A B B m,ttp B (3), A m EOO: EOO = {{ A, } k ttp,ttp A (4), TTP B m EOD: EOD = { A, TTP,, m 22 CMP1 { } b k ttp, mtch, m, mtch ( = true m h, : (1) () : 0 0 O = {,, b, ttp} ; Ob = {, b, b, ttp} () : () : B1 A CnProve P( b ) B2 B CnProve P( A, ) B3 A, B CnProve P( TTP, ttp ) (b) : T1 A, B CnProve (TTP Controls ( m B)) T2 A, B CnProve (TTP Controls mtc ) T3 TTP Clms ( m B) TTP Clms mtc (c) : C1 ( m B) B Hs m C2 B Clms B Hs m mtc B Clms m C3 TTP Clms ( TTP Clms ( m B) () EOO EOR:,CMP1 EOO EOR, EOO = { A,, EOR = A B h m B m, C3 {,,TTP, ( )},{, } b ttp,cmp1 (3) (4), (1) (2) CMP1 ( 3 ) TTP B :{ A, ( 4 ) TTP A :{ A, TTP,, { (2) () : b k ttp ttp b

7 : 1763 (G1) B CnProve ( A Clms (G2) A CnProve ( B Clms () EOO EOR : EOO Ob, { A, Ob B Hs { A,,B2 A3 : EOR O, { A, TTP, O,{ O A Hs { A, TTP, b A Hs { ttp,c3 A2 :,T1 A4 :,C1 A2 : (2),T3 A2 :,T2 A4 :, (3) A1 :,B3 A3 : B CnProve ( A Clms (G1) b,b1 A3 : ttp A CnProve ( B Clms (1) A CnProve (TTP Clms ( A CnProve (TTP Clms ( m B)) (2) A CnProve ( m B) A CnProve ( B Hs (3) A CnProve (TTP Clms mtc ) A CnProve mtc A CnProve (( B Hs mtc ), (1) A1 : A CnProve (( B Clms ( B Hs mtc ),C2 A2 : A CnProve ( B Clms (G2), CMP1 EOO EOR () :, O 3 = b O 2 b EOO, O 4 O EOR = 3 : EOO O 3 b Ob EOO O 4 O, (3) : EOO O EOR O, = 1,2,3,4 b 3 1 O ˆ 1 1 b ttp 3 EOO O b, 3 3 O O =, ({ A, TTP,,{ ) O, EOR ˆ O,, 3 31 Zhou-Gollmnn Zhou-Gollmnn [8],

8 1764 Journl of Softwre 2005,16(10) c = { l = ) EOO = { f, c} EOR = { f, A, c} EOO 1 sub _ = { f, } con _ = { f, A, } SUB (1) A B : f, c, EOO EOO (2) B A : f, A, EOR EOR (3) A TTP : fsub, sub _ (4) B TTP : fcon, A, con _ (5) A TTP : fcon, A, con _ EOR CON b,m A B ; A ;c m ; A B m ; sub _ A ; con _ TTP l = ), m (1),A B EOO c (2),B A EOR (3),A TTP sub _,,,B TTP m, A TTP,B TTP A (3) (3),TTP con _ con _, (4) (5),B A TTP con_ 32 Zhou-Gollmnn,, verfy : verfy ( c, = true c, m : T1 TTP Clms A Clms T2 TTP Clms TTP Clms verfy( c, T3 A, B CnProve (TTP Controls verfy( c, : C1 TTP Clms TTP Clms ( con_) C2 TTP Clms ( con _ ) B Hs con_ C3 B Clms c B Hs con _ verfy( c, B Clms m EOO EOR : EOO = EOO, con _ = { f, c},{ f, A, }, EOO ttp CON ttp EOR = EOR, con _ = { f, A, c},{ f, A, } EOR CON b ttp 22, :Zhou-Gollmnn EOO EOR : B CnProve ( A Clms (G1) A CnProve ( B Clms (G2),,, 4,,, CMP1,TTP : m m, Zhou-Gollmnn,TTP : con_;ttp A ; c m

9 : 1765, A6~A8,,,, [10,11],,, ;, [12,13],, [14],,, References: [1] Qng SH Cryptogrphy nd Computer Network Securty Bejng: Tsnghu Unversty Press, 2001 (n Chnese) [2] Qng SH Desgn nd logcl nlyss of securty protocols Journl of Softwre, 2003,14 (7): (n Chnese wth Englsh bstrct) [3] Burrows M, Abd M, Needhm R A logc of uthentcton ACM Trns on Computer Systems, 1990,8(1):18 36 [4] Syverson PF, vn Oorschot PC On unfyng some cryptogrphc protocol logcs In: Proc of the 1994 IEEE Computer Socety Symp on Reserch n Securty nd Prvcy Los Almtos: IEEE Computer Socety Press, publctons/chacs/1994/1994syverson-sppdf [5] lr R Accountblty n electronc commerce protocols IEEE Trns on Softwre Engneerng, 1996,22(5): [6] Zhou DC, Qng SH, Zhou ZF Lmttons of lr logc Journl of Softwre, 1999,10(12): (n Chnese wth Englsh bstrct) [7] Zhou DC, Qng SH, Zhou ZF A new pproch for the nlyss of electronc commerce protocols Journl of Softwre, 2001,12(9): (n Chnese wth Englsh bstrct) [8] Zhou J, Gollmn D A fr non-repudton protocol In: Proc of the 1996 IEEE Symp on Securty nd Prvcy Los Almtos: IEEE Computer Socety Press, [9] Deng R, Gong L Prctcl protocols for certfed electronc ml Journl of Network nd Systems Mngement, 1996,4(3): [10] Qng SH The TTP roles n electronc commerce protocols Journl of Softwre, 2003,14(11): (n Chnese wth Englsh bstrct) [11] Qng SH Securty Protocols Bejng: Tsnghu Unversty Press, 2005 (n Chnese) [12] Asokn N, Shoup V, Wdner M Optmstc fr exchnge of dgtl sgntures In: Nyberg ed Advnces n Cryptology: Proc of the Eurocrypt 98 LNCS 1403, Sprnger-Verlg, [13] Asokn N, Schunter M, Wdner M Optmstc protocols for fr exchnge Reserch Report, RZ 2858, IBM Reserch, 1996 [14] Qng SH, L GC A forml model of fr exchnge protocols Scence n Chn (E), 2005,35(2):16172 (n Chnese wth Englsh bstrct) : [1] :,2001 [2],2003,14(7): [6],, lr,1999,10(12): [7],,,2001,12(9): [10],2003,14(11): [11] :,2005 [14], (E ),2005,35(2):16172

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