Re: Zfone and ZRTP :: encryption for voip protocols

2006-03-16 Thread Ed Gerck

cybergio wrote:


Zfone :: http://www.philzimmermann.com/EN/zfone/index.html


...it achieves security without reliance on a PKI, key certification,
trust models, certificate authorities, or key management...

Good. But, uf course, there's a trust model and you need to rely on it.

...allows the detection of man-in-the-middle (MiTM) attacks by
displaying a short authentication string for the users to read and
compare over the phone.

Depends on the trust model. May not work.

Cheers,
Ed Gerck

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Re: ISO rejects WAPI (for now)

2006-03-16 Thread David Johnston

Joachim Strombergson wrote:


Aloha!

I don't know if you have seen this, but ISO rejected the WAPI standard 
proposal, opting instead for 802.11i/WPA2.


http://eet.com/news/design/business/showArticle.jhtml?articleID=181502994

How terrible, AES instead of the secret sauce-cipher. ,-)

WAPI is no longer secret sausce. It has been published in Chinese, 
including the formerly unpublished SMS4 block cipher.





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Re: ISO rejects WAPI (for now)

2006-03-16 Thread Joachim Strombergson

Aloha!

David Johnston wrote:

Joachim Strombergson wrote:
I don't know if you have seen this, but ISO rejected the WAPI standard 
proposal, opting instead for 802.11i/WPA2.


http://eet.com/news/design/business/showArticle.jhtml?articleID=181502994

How terrible, AES instead of the secret sauce-cipher. ,-)

WAPI is no longer secret sausce. It has been published in Chinese, 
including the formerly unpublished SMS4 block cipher.


Great, now could anybody please decipher the Chinese-encrypted 
description? ;-)


On a more serious note, has anybody done any analysis of SMS4 yet? The 
only thing I could find when Googling was this ISO document related to 
the fast track-effort. The actual text about SMS4 is rather brief:


https://committees.standards.org.au/COMMITTEES/I-000/X0001/JTC001-N-7904.pdf

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Med vänlig hälsning, Cheers!

Joachim Strömbergson

Joachim Strömbergson - ASIC designer, nice to *cute* animals.
snail:  phone:   mail  web:
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Re: Zfone and ZRTP :: encryption for voip protocols

2006-03-16 Thread Victor Duchovni
On Wed, Mar 15, 2006 at 02:52:15PM -0800, Ed Gerck wrote:

 cybergio wrote:
 
 Zfone :: http://www.philzimmermann.com/EN/zfone/index.html
 
 ...it achieves security without reliance on a PKI, key certification,
 trust models, certificate authorities, or key management...
 
 Good. But, uf course, there's a trust model and you need to rely on it.
 
 ...allows the detection of man-in-the-middle (MiTM) attacks by
 displaying a short authentication string for the users to read and
 compare over the phone.
 
 Depends on the trust model. May not work.

Indeed, but it looks to be the right security model for the mass market.

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Uncracked Enigma messages score: 2 done, 1 to go.

2006-03-16 Thread Perry E. Metzger

The project to crack three remaining unsolved WWII era Enigma messages
has now completed two of them...

http://news.bbc.co.uk/2/hi/technology/4808882.stm

Perry

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