【Vista之家译】Vista SP1将修补ReadyBoost的性能问题

【Vista之家译】Vista SP1将修补ReadyBoost的性能问题

微软将在7月中旬放出Vista SP1 Beta的消息已经遍布全球了。现在微软的一个员工透露，在SP1中，将着重修补ReadyBoost的性能问题。

Robert Hensing，微软的一位安全工程师近日在blog中透露，现在的ReadyBoost又有一个巨大的漏洞。这个漏洞将导致过多的硬盘读取次数，使得系统速度变慢。而这个漏洞的原因是因为ReadyBoost把所有缓存的数据都用AES-128算法进行了加密，一个很好的想法，但是不该用在这。 

Vista之家（www.vista123.com）特别提供英文原文如下：

Vista SP1 will fix critical ReadyBoost performance bug

A day prior to Mary Jo Foley's report on the mid-July release date for the beta of Vista SP1, a Microsoft employee silently outlined a critical flaw in Windows Vista’s ReadyBoost feature and mentioned SP1 would include the fix - a rare occasion under the new Sinofsky administration.

Robert Hensing, a security engineer at Microsoft, wrote on his blog about a performance flaw in ReadyBoost which severely hindered the responsiveness after resuming from standby (S3) or hibernate (S4) due to an architectural bug. The problem causes irregular and unnecessary hard-disk thrashing after resume which can take up to 8 minutes to settle down - ironically the outcome is the exact opposite of ReadyBoost’s purpose to increase responsiveness by caching. The cause is a simple yet stupid oversight in the design of ReadyBoost’s security system which encrypts all cache-data with an AES-128 encryption key, a great idea badly implemented.