Cryptanalysis of digital multisignature schemes for authenticating delegates in mobile code systems
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Shieh et al. proposed two multisignature schemes for message recovery -the parallel multisignature scheme and the serial multisignature scheme - for authenticating delegates in mobile code systems. In this paper, we will show that Shieh et al.'s multisignature schemes are vulnerable to insider forgery attacks hence cannot achieve the security requirements they claimed.
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