[Cisspstudy] Stream ciphers

[Clement Dupuis]

Official because it was written by ISC2,  that's the only reason.

Clement

Clément Dupuis, CD
CISSP, GCFW, GCIA, QEH, QSA, Security+, CEH, ECSA, LPT, CCSA, CCSE, MBNS,
MBIS, MBHS,  ACE
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On Sun, Sep 27, 2009 at 10:57, gerritsjs <gerritsjs at gmail.com> wrote:

>  Clement,
>
>
>
> What defines “official”?  Just wonder.
>
>
>
> Jonus
>
>
>  ------------------------------
>
> *From:* cisspstudy-bounces at cccure.org [mailto:
> cisspstudy-bounces at cccure.org] *On Behalf Of *Clement Dupuis
> *Sent:* Sunday, September 27, 2009 7:50 AM
> *To:* The CISSP Study Mailing list
> *Subject:* Re: [Cisspstudy] Stream ciphers
>
>
>
> Good day,
>
> You are totally correct, stream cipher do rely on XOR or binary addition of
> bits.
>
> This is one of the many errors that have been identified within the
> official book.
>
> I would use this book only as a checklist of topics that might show up on
> the exam or as my secondary book.
>
> Take care
>
> Clement
>
>
>  On Sun, Sep 27, 2009 at 10:19, Andrea Gatta <andrea.gatta at gmail.com>
> wrote:
>
> Hi there,
> just to verify the content page 228 of the official ISC2 guide to CBK which
> stated: "
>
> stream-based cipher relies primarily on substitution
>
> "
>
> Honestly I thought stream cipher were mainly implemented using XOR
> operations.
>
> Andrea
>
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