43,472 reputation
1294172
bio website en.wikipedia.org/wiki/…
location United Kingdom
age 26
visits member for 2 years, 6 months
seen 2 days ago

Pentester, ex-developer, security researcher, reverse engineer, electronics tinkerer, internet activist, zombie eradicator, promulgator of useless facts, shrubbery inspector, bacon aficionado, devourer of donuts.

Strengths: Security, Crypto, Win32 API, C#, .NET, PHP, x86 assembly

All answers and comments are encrypted with ROT256-ECB.

Opinions are my own. Advice provided with no warranty.


Feb
16
asked Internal code-signing certificate on Windows
Feb
10
comment What could be the reason for the high traffic on the local network?
Could be malware, could be staff setting up BitTorrent seeds overnight on their systems. It's very difficult to tell. Where's the traffic going to? A few isolated IPs, or hundreds of different ones? Is it on a common port? Have you looked at the data being sent?
Feb
7
comment Bad practice to have a “god” password?
Why not just have an administrator account that has privileges to modify other users' data?
Feb
7
comment Weird condition in blind SQL injection point, substr() is valid for exactly two chars
Bizarre. Perhaps it's worth running SQLmap through a logging proxy to see what requests it's sending in order to exploit this?
Feb
7
awarded  Nice Answer
Feb
6
answered What can an attacker do if he knew my database credentials?
Feb
5
answered ASLR: why do only 12 bits change on 32bit system?
Feb
5
comment How to store salt?
@matejkramny No. The primary issue is that users will ALWAYS re-use their passwords for other sites. You have a duty of care to protect any passwords given to you.
Feb
4
answered Are there any working proof-of-concept comparison timing attacks?
Feb
4
comment Are there any working proof-of-concept comparison timing attacks?
There are two core problems here: 1) JIT languages generally suck for demonstrating timing attacks; the overheads of JITing, object creation, boxing, GC, etc. swamp the execution time until the timing is almost meaningless 2) The operations you are doing don't have big enough discrepancies; a string compare of a few tens of characters is not a good choice for a demonstration. In fact, your assertion that the comparisons you chose should be faster or slower seems to be entirely wrong; abbbbb / bbbbbb should be fast, aaaaab / aaaaaa should be about the same.
Feb
3
answered How hard is it to read flash memory off a chip?
Feb
3
comment How do we know if the hard disk we just bought is “clean”?
My advice still holds. You are screwed if that is the case.
Jan
31
comment How do we know if the hard disk we just bought is “clean”?
If they can influence a sensitive manufacturing process with hundreds if not thousands of people involved, and tens of thousands of affected customers world wide, then you're even more screwed.
Jan
31
comment How do we know if the hard disk we just bought is “clean”?
Exactly my point. You can't ever 100% verify the security of anything. Trying to do so is an exercise in futility. Like it or not, you have to rely upon implicit social constructs like trust and faith. There's nothing to stop the guy at Starbucks from filling your morning coffee with cyanide, but we have faith in the fact that he is deterred by the consequences, and faith that the judicial system would rightly prosecute him if he did poison you. Conversely, he trusts that you won't try to steal his cash register or throw your piping hot Grande Macchiato in his face after he serves you.
Jan
31
comment How do we know if the hard disk we just bought is “clean”?
If your adversary can modify your hard disk's firmware or hardware between the time that you order it from Amazon and the time that you plug it into your system, I suggest quitting your job, taking out a large loan, and flying out to somewhere sunny like the Bahamas, because you'll be glad that your last few days on earth were comfortable.
Jan
31
answered How do we know if the hard disk we just bought is “clean”?
Jan
31
comment How do we know if the hard disk we just bought is “clean”?
No link to mainstream malware, but that's a moot point - you should protect against unknown and future threats. It's possible, though. Give this a read: spritesmods.com/?art=hddhack&page=1
Jan
31
comment How do we know if the hard disk we just bought is “clean”?
That still doesn't cover other attacks, like firmware modification.
Jan
31
comment How do we know if the hard disk we just bought is “clean”?
You can't assume that the boot sector will be clean, and if you're using the drive for data rather than an OS then the boot sector probably won't get replaced. Then all it takes is for your BIOS to attempt to boot from it.
Jan
31
comment RSA vs ECDSA for VANET Security
Does the downvoter feel like gracing us with a comment, are are they just intent on being an unhelpful asshat?