IPG cracked with known plaintext

[Ted Garrett]

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At 05:32 PM 3/19/96 GMT, you wrote:
>First let us describe the IPG system in more conventional C:

[snip]

>So this algorithm is easily broken with known plaintext.

I seem to remember some sales named daemon stating that if anyone could break their system, the prize would be the company.  I imagine that the continuing rants from IPG are a means of devaluing the company beyond it's already measly worth, thus making the company unworth claiming.  It's obvious that the system has been trivially broken after a day and a half of being semi-published.

Is there any other point to this?

I could as easily generate an OTP pulling pages at random from the New England Journal Of Medicine or the Microsoft Visual C++ Programmer's Guide and XORing the text with my plaintext...

But that still leaves me in the cipher.obscurity = cipher.security realm, doesn't it?  Think we could sell it???  Of course, as long as it was someone else choosing the pages, I could trust it, right?  (Damn, which smiley is it for sarcasm?)



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Ted Garrett <teddygee at visi.net>  http://www.visi.net/~teddygee
"Those who desire to give up Freedom in order to gain
  Security will not have, nor do they deserve, either one."
					Thomas Jefferson