Chinese crack SHA-1

Powered by SC Magazine
 

The Secure Hash Algorithm (SHA-1), previously thought of as virtually unbreakable, has been cracked by a research team from China.

The team, from Shandong University, the Chinese Academy of Sciences and Shanghai Jiaotong University, has proven SHA-1, used in the generation of digital signatures, can be compromised by a supercomputer.

"This attack builds on previous attacks on SHA-0 and SHA-1, and is a major, major cryptanalytic result," said cryptographic expert Bruce Schneier in his weblog. "It pretty much puts a bullet into SHA-1 as a hash function for digital signatures."

It was believed that some 2^80 operations would be needed to achieve a match (known as a collision). The research proves that a collision can be achieved at the much lesser figure of 2^69. A number that, although large, is breakable with today's computer technology.

Xiaoyun Wang, Yiqun Lisa Yin, and Hongbo Yu, who cracked SHA-1, last year released a paper discussing ways to compromise MD-4, MD-5, HAVAL and RIPEM-D, a group of other well-known algorithms.

www.schneier.com

Copyright © SC Magazine, US edition


Tags
 
 
 
Top Stories
The iTnews Benchmark Awards
Meet the best of the best.
 
Telstra hands over copper, HFC in new $11bn NBN deal
Value of 2011 deal remains intact.
 
Photos: iTnews Benchmark 2015 finalists revealed
Awards alumni gather to celebrate.
 
 
Sign up to receive iTnews email bulletins
   FOLLOW US...
Latest Comments
Polls
Who do you trust most to protect your private data?







   |   View results
Your bank
  39%
 
Your insurance company
  4%
 
A technology company (Google, Facebook et al)
  8%
 
Your telco, ISP or utility
  7%
 
A retailer (Coles, Woolworths et al)
  2%
 
A Federal Government agency (ATO, Centrelink etc)
  20%
 
An Australian law enforcement agency (AFP, ASIO et al)
  14%
 
A State Government agency (Health dept, etc)
  6%
TOTAL VOTES: 1745

Vote
Do you support the abolition of the Office of the Information Commissioner?