Re: ciphertext change results..

ppear...@xxxxxxxxxxxxxxx wrote:
> In "Output Feedback" (OFB) mode, just that one bit will be
> toggled.

and

ashish.sharma.ait@xxxxxxxxx wrote:
> It will be completely scrambled if you use the cipher in any block /
> block chaining mode. If however, the cipher was only being used to
> generate keystream (counter mode, as a stream cipher), there will be no
> error propogation. Only the changed bit/bits will be in error.

Thanks for your replies,

for example we have an input stream that  is digital plain voice
signal.
No compression, no protocol etc. only 8 bit digitized voice.

input stream =>encrypt =>DAC =>analog channel=>ADC =>decrypt=> output
stream

I hope "output bit stream" will be close to "input bit stream".

Analog channel ADC, DAC will add some noise and some bits will be
toggled after ADC with respect to DAC input. But I hope it's effect
will not be too significant.

And I hope output voice signal will not disturbed too much.

What do you think? Can I lose all data in this setup?

Thanks again

.

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