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| Subject: | [REVS] Anti Brute Force Resource Metering |
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| Date: | 23 Mar 2005 12:06:13 +0200 |
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com - - promotion The SecuriTeam alerts list - Free, Accurate, Independent. Get your security news from a reliable source. http://www.securiteam.com/mailinglist.html - - - - - - - - - Anti Brute Force Resource Metering ------------------------------------------------------------------------ SUMMARY The below linked whitepaper discusses how resource metering on the client-side, i.e. making him work to make brute forcing computationally feasible, works and the security advantages it can bring. DETAILS Abstract: Web-based applications authentication processes are frequently vulnerable to automated brute force guessing attacks. Whilst commonly proposed solutions make use of escalating time delays and minimum lockout threshold strategies, these tend to prove ineffectual in real attacks and may actually promote additional attack vectors. Resource metering through client-side computationally intensive "electronic payments" can provide an alternative strategy in defending against brute force guessing attacks. ADDITIONAL INFORMATION The information has been provided by <mailto:gunter@ngssoftware.com> Gunter Ollmann. The original article can be found at: <http://www.ngssoftware.com/papers/NISR-AntiBruteForceResourceMetering.pdf> http://www.ngssoftware.com/papers/NISR-AntiBruteForceResourceMetering.pdf ======================================== This bulletin is sent to members of the SecuriTeam mailing list. To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com ==================== ==================== DISCLAIMER: The information in this bulletin is provided "AS IS" without warranty of any kind. In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.
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