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Stream Cipher Operation Modes with Improved Security against Generic Collision Attacks

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Figure

Fig. 1. E0 encrpytion engine. x1t, . . . , x4t denote the output bits of the four LFSRs, respectively, in step t.(cf
Fig. 2. Initializing the E0 LFSRs. ADR[i], Kc[i], and CL[i] denote the bytes of ADR, Kc, and CL, respec-tively
Fig. 3. Structure of A5/1, which consists of three LFSRs of total state length 64 bit
Fig. 4. Structure of Trivium (total state length 288 bit). zi denotes the output bit in step i
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