11 November, 2005

"Cryptography is not Sudoku"

In 2002, David Kahn gave a speech to an NSA audience arguing that "cryptanalysis is dead". However, he went on to say that, "though traditional cryptanalysis may be dead, and may have been mostly a corpse for half a century, other opportunities, perhaps more opportunities, lie ahead." Kahn suggested increased opportunities for interception, side-channel attacks, placing back-doors in exported equipment and software, and so forth.

Maybe Kahn is right. I toy around with the following pet conspiracy theory: the recent promotion of codebreaking puzzles and competitions on the NSA and GCHQ websites is misdirection, and an indication that these agencies aren't actually doing a lot of pure cryptanalysis any more. Why would a codebreaking agency call attention to the fact that it breaks codes? Well, a target nation could think, "NSA and GCHQ are about using mathematics to read ciphers. They might still be breaking the systems of [insert developing country here], but our methods are mathematically impregnable, so we don't need to be concerned". Meanwhile, GCHQ or the NSA are compromising their communications through other means.

Anyway, enough with the tin-foil hat stuff. My apologies. Moreover, there's the occasional rumour that cryptanalysis is actually alive and well, as in the recent case of Iraqi leader Ahmed Chalabi. Wikipedia relates the story:

"In June 2004, it was reported that Chalabi gave U.S. state secrets to Iran in April, including the fact that one of the US's most valuable sources of Iranian intelligence was a broken Iranian code used by their spy services. Chalabi allegedly learned of the code through a drunk American involved in the code-breaking operation. Chalabi has denied all of the charges."

Who knows what lies behind this story? Still, a couple of days ago, a reporter speculated that Chalabi broke the codes himself, as he has a doctorate in mathematics. I very much enjoyed the incredulous comments given at the Orbus Quintus blog by "badgerminor" in response.

Sudoku is great fun, by the way.

9 Comments:

Anonymous Anonymous said...

Yes -- but it's easy to write a program that solves. For a real challenge how about trying to break some of the original Enigma messages?

12:45 pm  
Blogger One J said...

discount oakley sunglasses
www.louisvuitton.com
michael kors
red christian louboutin
true religion outlet
prada uk
louis vuitton outlet
coach outlet
kids lebron james shoes
louis vuitton outlet
christian louboutin sale
coach factory outlet
coach outlet
michael kors outlet
retro 9
michael kors outlet
cheap jordans
oakley sunglasses
ray ban sunglasses outlet
abercrombie & fitch
ray ban sunglasses
juicy couture outlet
michael kors outlet online
20150525yuanyuan

9:37 am  
Blogger Lin Shijun said...

shijun 6.27
coach outlet
jordan shoes
michael kors
coach outlet online
oakley sunglass
kate spade purses
michael kors outlet
new jordans
jordan 4 retro
white timberland boots
hollister
louis vuitton handbags
coach factory outlet
tod's outlet
ralph lauren outlet online
christian louboutin shoes
louis vuitton handbags
nfl jerseys
celine luggage tote
pandora rings
wholesale nfl jerseys
tods sale
insanity dvd sale
cheap chanel handbags
louis vuitton outlet
coach factory outlet online
ray ban wayfarer
michael kors outlet
christian louboutin sale
jordan shoes
ray ban aviators
toms.com
louis vuitton handbags
lululemon outlet
soccer jerseys
marc jacobs
jordan 11 columbia
dior outlet store
polo ralph lauren
michael kors handbags

2:22 am  
Blogger 柯云 said...

2015-12-07keyun
p90x
louis vuitton purses
ed hardy outlet
louis vuitton outlet stores
uggs for women
louis vuitton purses
sunglasses oakley
uggs boots for women
ugg boots outlet
abercrombie and fitch
oakley sunglasses
ugg slippers
michael kors outlet
retro 11
ralph lauren
ugg boots
ray ban outlet
michael kors handbags
fit flops
fake oakley sunglasses
louis vuitton
jordan concords
burberry sale
coach outlet
tory burch outlet
the north face jackets
michaek kors
michael kors handbags
giuseppe zanotti outlet
cheap jordans
cheap oakley sunglasses
christian louboutin outlet
michael kors handbags
abercrombie & fitch
ugg outlet
canada goose
jordan retro 11
christian louboutin shoes
hollister kids
oakley sunglasses wholesale

3:14 am  
Blogger ninest123 said...

ninest123 16.01
louis vuitton outlet, ralph lauren outlet, louis vuitton outlet online, uggs on sale, tiffany jewelry, nike outlet, cheap jordans, louboutin shoes, louis vuitton outlet, cheap oakley sunglasses, louis vuitton, michael kors outlet, michael kors outlet online, uggs on sale, michael kors, ralph lauren polo, gucci handbags, michael kors outlet online, uggs on sale, oakley sunglasses, oakley sunglasses, longchamp outlet, burberry outlet, oakley sunglasses, prada handbags, ray ban sunglasses, replica watches, nike air max, nike air max, ray ban sunglasses, longchamp bags, nike free, christian louboutin, uggs outlet, christian louboutin, tiffany jewelry, michael kors outlet online, louboutin uk, michael kors handbags, tory burch outlet, burberry factory outlet, prada outlet, replica watches, ray ban sunglasses, uggs outlet, oakley sunglasses, longchamp outlet, louis vuitton handbags

4:55 am  
Blogger ninest123 said...

nike free pas cher, nike air max, new balance, nike tn pas cher, vans pas cher, michael kors uk, nike trainers uk, true religion outlet, michael kors, hollister uk, jordan pas cher, lunette oakley pas cher, vanessa bruno pas cher, coach outlet store online, nike free, longchamp pas cher, lunette ray ban pas cher, hogan sito ufficiale, converse, nike roshe run pas cher, nike air max uk, sac guess pas cher, ray ban uk, north face uk, longchamp soldes, coach purses, burberry pas cher, nike blazer pas cher, lululemon outlet, true religion outlet, mulberry uk, nike roshe uk, louboutin pas cher, polo ralph lauren uk, michael kors, ralph lauren pas cher, nike air max pas cher, north face pas cher, timberland pas cher, abercrombie and fitch, true religion outlet, nike air max uk, polo lacoste pas cher, michael kors outlet online, nike air force, true religion jeans, abercrombie and fitch UK, hermes pas cher, replica handbags

4:58 am  
Blogger ninest123 said...

s6 cases, iphone 6 cases, iphone cases, hollister clothing, hollister, nfl jerseys, soccer shoes, iphone 6s plus cases, vans outlet, insanity workout, lululemon outlet, iphone 6s cases, softball bats, nike roshe run, salvatore ferragamo, converse, north face outlet, babyliss pro, instyler ionic styler, new balance shoes, mcm handbags, north face outlet, asics running shoes, hermes handbags, polo ralph lauren, iphone 6 plus cases, nike air max, nike air max, wedding dresses, valentino shoes, abercrombie and fitch, p90x workout, giuseppe zanotti, herve leger, bottega veneta, timberland boots, vans scarpe, ghd hair, ipad cases, mac cosmetics, jimmy choo outlet, celine handbags, louboutin, iphone 5s cases, oakley, soccer jerseys, gucci, reebok outlet, beats by dre, ray ban, mont blanc, chi flat iron

5:01 am  
Blogger ninest123 said...

canada goose jackets, converse shoes outlet, ugg,uggs,uggs canada, canada goose jackets, ugg,ugg australia,ugg italia, moncler, montre pas cher, canada goose, canada goose uk, supra shoes, wedding dresses uk, replica watches, moncler pas cher, louis vuitton, canada goose outlet, ugg pas cher, moncler, moncler jackets, marc jacobs, pandora charms, pandora jewelry, doke & gabbana, pandora jewelry, barbour, louis vuitton uk, louis vuitton, toms shoes, juicy couture outlet, swarovski jewelry, canada goose, moncler outlet, thomas sabo uk, juicy couture outlet, moncler uk, moncler, hollister, ugg uk, coach outlet, barbour jackets uk, canada goose pas cher, canada goose outlet, sac louis vuitton, bottes ugg pas cher, links of london uk, karen millen uk, swarovski uk, pandora uk, moncler, lancel, sac louis vuitton
ninest123 16.01

5:55 am  
Blogger dong dong23 said...

louis vuitton outlet
gucci outlet
michael kors uk
michael kors outlet clearance
michael kors outlet
oakley outlet
beats headphones
ray ban sunglasses discount
nike sb
louis vuitton outlet stores
supra sneakers
louis vuitton outlet
oakley vault
ralph lauren outlet
coach factorty outlet
oakley sunglasses
adidas originals
michael kors outlet
kevin durant shoes 8
cheap nfl jerseys
coach outlet
nike roshe runs
cheap oakley sunglasses
cheap jordans
kate spade handbags
coach outlet
ray ban sunglasses
ray ban sunglasses
michael kors handbags
coach outlet
cheap nfl jerseys
toms shoes
caoch outlet
christian louboutin shoes
ray ban sunglasses
louis vuitton outlet
ralph lauren polo
replica watches
nike air max
louis vuitton handbags
20164.16wengdongdong

3:17 am  

Post a Comment

<< Home