Jim Keller to Depart Intel • Hacker News Board

Re: Jim Keller to Depart Intel

#111

Post by ReticentVole » Sat, Jun 13, 2020, 4:20 AM UTC

harichinnan wrote: post #102

arein2 wrote: post #65

Earlier quoted context omitted.

The mood of the country is racist propaganda I mean a lot of things are obvious, why pretend they are not

Police killing black men is no longer racist propaganda. It's a reality of life for black people.

If Black men committed less crime, they wouldn't get in trouble with police in the first place.

http://www.nyc.gov/html/nypd/downloads/pdf/analysis_and_plan...

Page 24 - subjects firing on Police: 79% Black Subjects killed by Police gunfire: 69% Black

Re: Jim Keller to Depart Intel

#112

Post by legulere » Sat, Jun 13, 2020, 9:05 PM UTC

wolfgke wrote: post #83

etaioinshrdlu wrote: post #67

Earlier quoted context omitted.

No one thought of speculative execution and hypertheading as performance hacks until the last few years. They were brilliant techniques. They still are, they just were found to have a cost. They are still used now but more carefully. Intel Management Engine and SGX on the other hand, are basically user-hostile parts of the hardware, with some bugs mixed in.

> No one thought of speculative execution and hypertheading as performance hacks until the last few years. "Everybody" who has some knowledge in security (espcially with respect to side channels) knew from beginning that these CPU features were a ticking time bomb in terms of potential side channels. What was unclear was how this (at this time played down by CPU vendors) potential threat could be used to create real…

That’s not the impression that I got. Research on side channels were basically limited to timing side channels in cryptography. Everything else was not seen as practically exploitable.

Re: Jim Keller to Depart Intel

#113

Post by wolfgke » Mon, Jun 15, 2020, 10:46 AM UTC

legulere wrote: post #112

wolfgke wrote: post #83

Earlier quoted context omitted.

> No one thought of speculative execution and hypertheading as performance hacks until the last few years. "Everybody" who has some knowledge in security (espcially with respect to side channels) knew from beginning that these CPU features were a ticking time bomb in terms of potential side channels. What was unclear was how this (at this time played down by CPU vendors) potential threat could be used to create real…

That’s not the impression that I got. Research on side channels were basically limited to timing side channels in cryptography. Everything else was not seen as practically exploitable.

> Everything else was not seen as practically exploitable.

For a concrete blog post, see https://cyber.wtf/2017/07/28/negative-result-reading-kernel-...

Note that according to https://en.wikipedia.org/w/index.php?title=Spectre_(security... Spectre was published January 2018, i.e. this blog post is indeed older.

As I wrote: It was unclear how this potential threat could be used to create real attacks.