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February 16, 2005

今天两条消息 SHA-1 broken 和 RHEL 4

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https://windtear.net/archives/2005/02/16/000577.html http://windtear.net/archives/2005/02/16/000577.html

1.
http://www.schneier.com/blog/archives/2005/02/sha1_broken.html

February 15, 2005

SHA-1 Broken

SHA-1 has been broken. Not a reduced-round version. Not a simplified version. The real thing.

The research team of Xiaoyun Wang, Yiqun Lisa Yin, and Hongbo Yu (mostly from Shandong University in China) have been quietly circulating a paper announcing their results:

  • collisions in the the full SHA-1 in 2**69 hash operations, much less than the brute-force attack of 2**80 operations based on the hash length.
  • collisions in SHA-0 in 2**39 operations.
  • collisions in 58-round SHA-1 in 2**33 operations.

This attack builds on previous attacks on SHA-0 and SHA-1, and is a major, major cryptanalytic result. It pretty much puts a bullet into SHA-1 as a hash function for digital signatures (although it doesn't affect applications such as HMAC where collisions aren't important).

The paper isn't generally available yet. At this point I can't tell if the attack is real, but the paper looks good and this is a reputable research team.

More details when I have them.

Posted on February 15, 2005 at 07:15 PM



2.
http://www.redhat.com/magazine/004feb05/features/enterprise/
http://www.redhat.com/software/rhel/features/

采用 2.6 的内核
lvm 升级
SELinux 安全增强 策略控制
udev
桌面使用加入firefox 升级evolution到2.0
IIIMF 输入法框架

----->
2004-09-05 22:29 我爱网络 hao123 的成功与 MD5 碰撞
2004-08-20 19:07 我爱网络 MD5 SHA-0 双双被攻破 安全界一片血雨腥风
hao123 的成功与 MD5 碰撞
MD5 SHA-0 双双被攻破 安全界一片血雨腥风
 
本blog WWW

Posted by windtear at February 16, 2005 7:39 PM

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