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Nytro

RC4 128 bit - Crackable?

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Ce parere aveti?

Fiind pe 128 de biti avem:

4 mld * 4 mld * 4 mld * 4 mld de chei. Adica un numar cu 36 de cifre. [340.282.366.920.938.463.463.374.607.431.768.211.456]

Pare destul de greu sa incerci atatea combinatii, chiar si pentru milioane de procesoare/GPU.

Sa presupunem ca putem sparge 2^64 [18.446.744.073.709.551.616], adica 18 miliarde de miliarde de chei pe secunda. Raman insa tot atatea secunde de crackuit... Deci un atac bruteforce, matematic, pica.

Insa exista mai multe atacuri: https://en.wikipedia.org/wiki/RC4#Security

Ma intereseaza in mod special pentru SSL. Google, Facebook, Twitter si probabil multe altele folosesc SSL cu RC4 pe 128 de biti, despre care, in ziua de azi, se zice ca e slab/foarte slab.

Voi ce parere aveti? As dori niste argumente tehnice.

Daca veniti si cu niste paper-uri e perfect.

Edited by Nytro
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