M - Technische Universität Dresden
M - Technische Universität Dresden
M - Technische Universität Dresden
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S<br />
c R<br />
c 5<br />
c 4<br />
c 3<br />
c 2<br />
c 1<br />
k 5<br />
k 4<br />
k 3<br />
k 2<br />
k 1<br />
Re-encryption scheme for sender anonymity<br />
MIX 1 MIX 2 MIX 3 MIX 4 MIX 5<br />
d1 k1 d 2<br />
d 3<br />
encryption<br />
d4 k4 ... M n<br />
transfer<br />
... MIX n<br />
d 5<br />
decryption<br />
in direct re-encryption scheme for sender anonymity<br />
M n+1 = c n+1 (M)<br />
k 2<br />
M i = c i (z i , A i+1 , M i+1 ) for i = n,..,1<br />
k 3<br />
k 5<br />
M n+1<br />
M i = c i (k i , A i+1 ); k i (M i+1 )<br />
MIX n+1<br />
d R<br />
R<br />
44
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