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mjhall

HN member
Joined
Wed, Jun 01, 2011, 12:42 PM UTC
HN karma
55
Public activity
20 items

About mjhall

CS PhD student at Sheffield University, working in reverse engineering & state machines.

Recent public activity

  1. comment
    Comment #6640747

    I don't think the transfer occurs explicitly via LAN as other commenters point out, seems more likely Apple acts as a tunnel between the device requesting the keychain and the devi…

  2. comment
    Comment #6616917

    A bot doesn't necessarily only scan port 22 in a range - nothing stops the bot herder making it scan 1-1024 instead.

  3. comment
    Comment #5044738

    The current vulnerability affects environments where untrusted code already executes. Since applets can be used to upload arbitrary code, it makes sense to block it. This isn't a p…

  4. comment
    Comment #5036443

    The only means I know of for one to reliably detect the image on the screen would be TEMPEST style attacks [1]. I doubt that Capita can afford to buy the necessary equipment, or ev…

  5. comment
    Comment #5033166

    It still seems to contain an unpatched code execution vulnerability from 2010, fixed in CS5 and up [1], I'd say that's "bad enough" to warrant not using it. [1] : http://www.adobe.…

  6. comment
    Comment #4996681

    At a guess: eventually, yes. I don't think this actually writes over the heap at all - it writes to the .bss section instead. In theory, if left to execute (without the INT3s) it'd…

  7. comment
    Comment #4973010

    Re: the second question, the problem with NX is that it only protects you from overflows where the attacker jumps into the buffer. Overflows are still exploitable with NX. The atta…

  8. comment
    Comment #4519092

    To add to grecy's comment: Your login Keychain is usually unlocked - it's encrypted with a key derived from your password that's held in memory from when you log in. You can lock y…

  9. comment
    Comment #4412577

    These two 28C3 talks[0,1] discuss the precursor to such an apocalypse. [0]: http://events.ccc.de/congress/2011/Fahrplan/events/4871.en.h... [1]: http://events.ccc.de/congress/2011/…

  10. comment
    Comment #4236100

    I don't think the article's intention is to convince people it's a con or crush the enthusiasm. Their points aren't illegitimate and their arguments are fair - isn't it prudent to …

  11. comment
    Comment #4234888

    The argument isn't totally correct. The Police can't just make allegations and force you to surrender keys - they have to convince a judge that the allegations are true, and that g…

  12. comment
    Comment #4204092

    It's using sha256, which is far too fast. Key stretching is essential, especially when something as fast as a digest function like the SHA family is used. PBKDF2, as the article po…

  13. comment
    Comment #4105322

    I don't think the majority of the feature exclusivity is hardware, it's about differentiating the devices. iOS hardware seems to have hit a convergence point. Although the specs ar…

  14. comment
    Comment #4033271

    I hope it will raise awareness, but my cynical expectation is that the "Accept" button will become one people press habitually to get rid of an annoying banner. Sites abusing the F…

  15. comment
    Comment #4003830

    It'll be interesting to see if it achieves that goal. In my experience of watching my parents interact with a computer too many buttons translates to "complicated and scary". I thi…

  16. comment
    Comment #3825147

    Take a look at his comment history (turn showdead on first)[1]. He's a somewhat eccentric character. [1]:http://news.ycombinator.com/threads?id=losethos

  17. comment
    Comment #3424371

    They were, but my most recent experience has been that Windows will offer to make one for you on the first boot of a new machine.

  18. comment
    Comment #3273971

    I think the major downside is the world is immutable. For the search algorithm to run in short enough times to render in real time the point cloud needs to be organised very carefu…

  19. comment
    Comment #3070558

    The most significant part (I think, probably wrong) is on page 5[0] where he details the invalid instructions that do more than a NOP and why they're useful. [0] : http://www.laugh…

  20. comment
    Comment #2678455

    The writing style does seem different, sentences in this release aren't terminated in some cases, whereas those from officially corroborated releases always are.