Reusing random segments, 2xencryption

["N. E. Johnson" <NEJohnson@xxxxxxxxxxx>]

Re-using the random segments could create vulnerability because there is 
repetiton.  One Time Pad (OTP) is a simple, unbreakable scheme, but if you 
re-use the pads, it is easy to break.  I think that concept relates well to the 
issue of reusing a smaller random segment.  If you aren't familiar with OTP, it 
may be worthwhile to look up, because it is simple.  I don't know how to 
quantify the increase in vulnerability of using smaller segments.

The block ciphers already make multiple passes over the data.  Encrypting twice 
will cause you to use 2 passwords and so double the entropy in your key, but 
will still be vulnerable to an attack by pre-generated dictionary for known 
plain text. --if I understand what you mean by encrypting twice.

I was expecting this idea to be provocative and generate more response.  Are 
there other forums you would recommend for posting this proposal?

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