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Side channel attacks
rigorózní práce (UZNÁNO)
Zobrazit/ otevřít
Trvalý odkaz
http://hdl.handle.net/20.500.11956/19276Identifikátory
SIS: 67672
Kolekce
- Kvalifikační práce [10690]
Autor
Fakulta / součást
Matematicko-fyzikální fakulta
Obor
Matematické metody informační bezpečnosti
Katedra / ústav / klinika
Katedra algebry
Datum obhajoby
6. 1. 2009
Nakladatel
Univerzita Karlova, Matematicko-fyzikální fakultaJazyk
Čeština
Známka
Uznáno
The work extends the Hidden Number Problem (HNP) introduced by Boneh and Venkatesan in 1996. HNP is to find an unknown integer if several approximations of its multiples modulo N are known. New method for solving an extension of HNP (EHNP) is elaborated, taking into account the fragmentation of the information on the multiples and on the hidden number itself, as well. A real scenario application of the approach is presented - the private DSA key is extracted with the knowledge of side information on 5 signing operations. Such an information can be obtained if the signatures are generated in the unsecured environment of a Pentium 4 processor with Hyper-Threading technology.