[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Hiding Encrypted Messages
> > 2. Then take an encrypted PGP file and dispurse it bit-by-bit into the
> > LSB (least-significant-bit) of each sample. This wouldn't distort the
> > sound sample to any extent noticable by the human ear. Thus each byte
> > of PGP file would be dispursed into 8 bytes of sound file. Thus if
> > you wanted to send a 20k PGP file, you would have to put it into a
> > 160k music file.
> > If you're ever forced to explain what that file contains (unlikely, since
> > you can always take the Fifth Ammendment) you can just play it on your
> > computer and have the NSA/SS/FBI/Whatever listen to James Brown go
> > "Hyeeeah... I feel good!"
> a) This method has essentially the same complexity, as one-time pad,
> but without it's strength.
Insert pgp-encrypted (not plaintext) into the sound file... It's then
no weaker that pgp.
> b) If it's played and recognized - one can trace your source (a CD, a
> tape of radio broadcast, whatever) and do a comparison. Then the
> file containing of all the LSBs is cryptanalyzed...
Use a "windows sound system" board and record yourself talking --
No "reference source"... The codec on that board has better than
two bits of noise per 16 bit word through the ADC channel...
Nice idea, thug!
Eric Fogleman [email protected]
Analog Devices Semiconductor Voice: (617) 937-2275
804 Woburn Street Fax: (617) 937-2024
Wilmington, MA 01887-3462