m2) independently will generate 2 signatures (
E(m1 XOR 0) = s1
E(m2 XOR 0) = s2
E(m1 XOR 0) = s31 = s1
E(m2 XOR s1) = s32
rator\00\00\00 XOR s1. This will generate
E(m2 XOR s1 XOR 0)which is s32. now, knowing s1 and s32 you can put them together an generate the encryption of the full name Administrator.