Navigacija
Lista poslednjih: 16, 32, 64, 128 poruka.

GSM A5/3 cracked?

[es] :: Security :: Kriptografija i enkripcija :: GSM A5/3 cracked?

[ Pregleda: 1318 | Odgovora: 0 ] > FB > Twit

Postavi temu Odgovori

Autor

Pretraga teme: Traži
Markiranje Štampanje RSS

Nikola Krzalic
System Engineer / DevOps
Belgrade, Serbia

Član broj: 68680
Poruke: 528
93.87.255.*

Sajt: www.krzalic.com


Profil

icon GSM A5/3 cracked?12.01.2010. u 18:17 - pre 103 meseci
Skoro smo pricali o novokomponovanom napadu na A5/1. Izgleda da ni A5/3 (a.k.a Kasumi) nije postedjen:


Citat:
In this paper we describe a new type of attack called a sandwich attack, and use it to construct a simple distinguisher for 7 of the 8 rounds of KASUMI with an amazingly high probability of 2−14. By using this distinguisher and analyzing the single remaining round, we can derive the complete 128 bit key of the full KASUMI by using only 4 related keys, 226 data, 230 bytes of memory, and 232 time. These complexities are so small that we have actually simulated the attack in less than two hours on a single PC, and experimentally verified its correctness and complexity. Interestingly, neither our technique nor any other published attack can break MISTY in less than the 2128 complexity of exhaustive search, which indicates that the changes made by the GSM Association in moving from MISTY to KASUMI resulted in a much weaker cryptosystem.


http://threatpost.com/en_us/blogs/second-gsm-cipher-falls-011110

Kasumi se inace koristi na 3G GSM mrezama, i ovo ujedno predstavlja prvi prakticni napad na njega.
 
Odgovor na temu

[es] :: Security :: Kriptografija i enkripcija :: GSM A5/3 cracked?

[ Pregleda: 1318 | Odgovora: 0 ] > FB > Twit

Postavi temu Odgovori

Navigacija
Lista poslednjih: 16, 32, 64, 128 poruka.