[REVS] Anti Brute Force Resource Metering

From: SecuriTeam (support_at_securiteam.com)
Date: 03/23/05

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    To: list@securiteam.com
    Date: 23 Mar 2005 12:06:13 +0200

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      Anti Brute Force Resource Metering


    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.


    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.


    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


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