[Cryptography] tamper-evident crypto? (was: BULLRUN)

Charles Jackson clj at jacksons.net
Thu Sep 5 22:05:02 EDT 2013

On Thu, Sep 5, 2013 at 9:18 PM, Peter Gutmann <pgut001 at cs.auckland.ac.nz>wrote:

> >To say the same thing the other way, I was always amazed that the Nazis
> were
> >unable to figure out that their crypto was broken during WWII.  There were
> >experiments they could have done, such as sending out a few U-boats under
> >strict radio silence and comparing their longevity to others.
> Cognitive dissonance.  "We have been...", sorry "Ve haff been reassured zat
> our cipher is unbreakable, so it must be traitors, bad luck, technical
> issues,
> ...".

As I recall the history it was direction finding (HF-DF) that was causing
specific U-boats to be lost.  Crypto was more global---resulting in
rerouting convoys, etc.  See

After late '42 or so, U-boat radio silence would have indicated that using
the radios was a problem---even during the time that the Naval Enigma was
not being broken.



Charles L. Jackson

301 656 8716    desk phone
888 469 0805    fax
301 775 1023    mobile

PO Box 221
Port Tobacco, MD 20677
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.metzdowd.com/pipermail/cryptography/attachments/20130905/a6e45acc/attachment.html>

More information about the cryptography mailing list