盖茨演讲说Control-Alt-Del是错误的设计！但IBM不让造这新按键

盖茨在哈佛演讲说Control-Alt-Delete是错误的设计！当时的设计是要个特殊的按键告诉基层操作系统用户要登录,但微软负责软件,而IBM负责硬件的不让微软为此造个新按键，所以微软才创造了Control-Alt-Del组合键完成这功能。但盖茨承认这设计是错误！观众大笑！周三四晚（10月9日/10日）广深沙龙继续讲故事,Webplus.com报名

http://edition.cnn.com/2013/09/26/tech/innovation/bill-gates-control-alt-delete/index.html?iref=obinsite

http://www.youtube.com/watch?v=cBHJ-8Bch4E#t=10
Control-Alt-Delete, the keyboard shortcut so synonymous with computer rage that even your Nan’s heard of it. And now, despite it being a recurring feature of the Windows platform for near 30 years, even Bill Gates himself has admitted he hates it.
“It was a mistake,” Gates told a humoured audience at a Harvard fundraiser. “We could have had a single button, but the guy who did the IBM keyboard design didn’t wanna give us our single button.”
That guy at IBM was designer David Bradley, who has since admitted that creating the keyboard combination was “five minutes, 10 minutes of activity.” What’s that saying about a moment’s thoughtlessness leading to a lifetime’s worth of pain? Yeah Bradley, that one was made for you.


The origin of Control-Alt-Delete - David Bradley invented CTRL-ALT-DEL Bill Gates made it famous
http://www.youtube.com/watch?v=K_lg7w8gAXQ&feature=youtu.be
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http://www.youtube.com/watch?v=CIZGDT7ZqdM

@邓良丰:应该怎样设计?//@m_mai:[哈哈]当年搞到好神秘的样子
唐：按照用户体验，盖茨也承认类似苹果或Win8直接登录的设计好。如要安全系数高,还是Control-Alt-Del组合键好：两手同时没意外；组合键避免木马等病毒假装登录盗取密码，因为任何程序不知用户按组合键，组合键直接与OS沟通，最初与硬件BIOS沟通

http://security.stackexchange.com/questions/34972/ctrlaltdel-login-rationale-behind-it
IIRC back in the DOS days a program could register a keystroke combination on an interrupt. So TSR applications like Sidekick or other tools could magically pop up when you pressed the right combination. When NT 3.5 arrived it used Ctrl-Alt-Del to get to the logon page. The explanation at the time (no, this was years ago and before the WWW was invencted, I can't provide a link) was that Ctrl-Alt-Del was the only key combination an application could not intercept, it was reserved by DOS. So a malicious application could not intercept it and popup a fake login page.


This combination is called a Secure attention key. The Windows kernel is "wired" to notify Winlogon and nobody else about this combination. In this way, when you press Ctrl+Alt+Del, you can be sure † that you're typing your password in the real login form and not some other fake process trying to steal your password. For example, an application which looks exactly like the windows login. An equivalent of this in Linux is Ctrl+Alt+Pause
† This implies a trust in the integrity of the system itself, it's still possible to patch the kernel and override this behaviour for other purposes (malicious or completely legitimate)


As a side note: when you say it's "wired", what that actually means is that Ctrl+Alt+Del is a mapped to a hardware defined interrupt (set in the APIC, a physical chip on your motherboard). The interrupt was, historically, triggered by the BIOS' keyboard handler routine, but these days it's less clear cut. The interrupt is mapped to an ISR which is executed at ring0, which triggers the OS's internal handler for the event. When no ISR for the interrupt is set, it (usually) causes an ACPI power-cycle event, also known as a hard reboot. –

某种程度上，我支持ZF最近的网络净化工程，微博上的垃圾太多了。大家可搜索之前微博里报道盖茨Control-Alt-Del的帖子，基本上90%都是互相抄袭，其余10%有点原创意思的帖子都报道或翻译错。还是我辛苦点直接去看盖茨在Youtube上演讲的视频，直接翻译，比转发其他中文报道<转发<抄错<翻译错<离盖茨发言十万八千里！