Feeds

SHA-1 compromised further

Crypto researchers point the way to feasible attack

SANS - Survey on application security programs

Crypto researchers have discovered a new, much faster, attack against the widely-used SHA-1 hashing algorithm. Xiaoyun Wang, one of the team of Chinese cryptographers that demonstrated earlier attacks against SHA-0 and SHA-1, along with Andrew Yao and Frances Yao, have discovered a way to produce a collision in SHA-1 over just 263 hash operations compared to 269 hash operations previously. A brute force attack should take 280 operations.

One-way hashing is used in many applications such as creating checksums used to validate files, creating digital certificates, authentication schemes and in VPN security hardware. Collisions occur when two different inputs produce the same output hash. In theory this might be used to forge digital certificates but it shouldn't be possible to find collisions except by blind chance. Wang and her team have discovered an algorithm for finding collisions much faster than brute force. The researchers released a paper (PDF) on their finding at the Crypto 2005 conference in Santa Barbara, California earlier this week.

"The SHA-1 collision search is squarely in the realm of feasibility," writes noted cryptographer Bruce Schneier in a posting to his web log. "Some research group will try to implement it. Writing working software will both uncover hidden problems with the attack, and illuminate hidden improvements. And while a paper describing an attack against SHA-1 is damaging, software that produces actual collisions is even more so."

The US National Institute of Standards and Technology (NIST) recently advised the US government to phase out SHA-1 in favor of SHA-256 and SHA-512. NIST is holding a workshop on the subject in late October. ®

High performance access to file storage

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
Heartbleed exploit, inoculation, both released
File under 'this is going to hurt you more than it hurts me'
Arts and crafts store Michaels says 3 million credit cards exposed in breach
Meanwhile, Target investigators prepare for long process in nabbing hackers
Canadian taxman says hundreds pierced by Heartbleed SSL skewer
900 social insurance numbers nicked, says revenue watchman
prev story

Whitepapers

SANS - Survey on application security programs
In this whitepaper learn about the state of application security programs and practices of 488 surveyed respondents, and discover how mature and effective these programs are.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.