Welcome Guest [Log In] [Register]
Welcome to Crypto. We hope you enjoy your visit.


You're currently viewing our forum as a guest. This means you are limited to certain areas of the board and there are some features you can't use. If you join our community, you'll be able to access member-only sections, and use many member-only features such as customizing your profile, sending personal messages, and voting in polls. Registration is simple, fast, and completely free.


Join our community!


If you're already a member please log in to your account to access all of our features:

Username:   Password:
Add Reply
MilCrypt online
Topic Started: Jun 30 2008, 07:39 PM (210 Views)
jdege Jun 30 2008, 07:39 PM Post #1
Member Avatar
Elite member
[ * * * * * ]
 It's been quiet here, for a while.

Truth is, crypto is one of those subjects that doesn't lend itself to constant conversation. If I were to report every time I have discovered something new, it'd be months between such reports. (And then, it'd be almost uniformly my discovery something that has been long known to many others.)

But today I do have something to contribute.

It seems that the four volumes of William Friedman's "Military Cryptanalysis" are available on the NSA's website.

These have been available in print through Aegean Park Press: C-30, C-40, C-60, and C-61.

They are also on Dr. Dobbs Journal Essential Books on CD-ROM: Cryptography and Security.

But this is the first time I've seen them available for free.

NSA Declassification Initiatives

Military Cryptanalysis Part I
Military Cryptanalysis Part II
Military Cryptanalysis Part III
Military Cryptanalysis Part IV
When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.
Offline Profile Quote Post Goto Top
 
Revelation Jul 5 2008, 02:21 PM Post #2
Member Avatar
Administrator
[ * * * * * ]
 This is a nice find! Thanks :D

Quote:
 
It's been quiet here, for a while.


Indeed. I've been very busy with creating my own OS (just for fun) and of course with the ACA's challenges.
RRRREJMEEEEEPVKLWENFNVJKEEEEEAOLKAFKLXCFZAASDJXZTTTTTTTLSIOWJXMOKLAFJNNKFNXN
RAGRBAQEMHIGDJVDSEOXVIYCELFHWLELJFIENXLRATALSJFSLCYTKLASJDKMHGOVOKAJDNMNUITN
RRRRLJVEEEEECLYVYHNVPFTAEEEEEMWLMEIRNGLARWJAKJDFLWNTIERJMIPQWOTZEOCXKNUBNXCN
RJIRPOWEANFUSNCZVDVZNMSFEKLOEPZLDKDJWSAAAAAAAOERHJCTNCKFRIMVKSOFOMKMANREWNBN
RZUDRGXEEEEENFQIDVLQNCKNEEEEEDGLLLLLLAWIOSNCDARLODMTOEJXMILDFJROTKJSDNLVCZNN
Offline Profile Quote Post Goto Top
 
jdege Jul 6 2008, 01:05 AM Post #3
Member Avatar
Elite member
[ * * * * * ]
Revelation
Jul 5 2008, 02:21 PM
Indeed. I've been very busy with creating my own OS (just for fun) and of course with the ACA's challenges.
ANCHISES, from the ACA, has a fascinating article in the current Cryptologia, on using Simulated Annealing to solve short Playfairs.

His findings:

1. Using quadrigram log frequencies is the best scoring method.
2. Simulated annealing works better than shotgun, but only in the middle temperatures. He claims that when the temp is too high and when it's too low, there's little progress towards the correct solution - it's in the middle when the rapid progress is made, and that can be accomplished by setting a single middling temperature and never changing it.
When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · General · Next Topic »
Add Reply