The core of HashDoS vulnerabilities lies in deterministic hash functions - if the attacker can predict the hash values of their inputs, they can craft inputs that reliably trigger worst-case performance in the target server. The standard mitigation is to mix a seed value into the computation of the hash, and make sure that the seed is randomly generated at program initialization. This way, even if the attacker knows the hash function, they can't predict the hash values without knowing the seed that changes whenever the server restarts, and therefore can't craft inputs that will reliably collide.
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Автор: Марина Совина (ночная смена)，详情可参考金山文档
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