Reputation
1,848
Top tag
Next privilege 2,000 Rep.
Edit questions and answers
Badges
1 9 23
Newest
 Nice Answer
Impact
~64k people reached

May
21
comment Multiple browser instances through differents openvpn
Why do you need this? There may be a simpler way to do whatever you're trying to do.
Apr
30
comment Why do PCs still require a CMOS battery?
@Marcel I believe Babbage's design would have been powered by steam. Granted it wasn't built, and wouldn't have been a PC, but it wouldn't have used electricity.
Apr
25
awarded  Nice Answer
Apr
15
comment Does increasing upload or download speed reduce ping?
@RockPaperLizard If a connection is saturated, then a router somewhere along the line will have to hold your packet for some amount of time. To take an extreme instance, if there were only one transatlantic cable and it only sent one packet a second, you would have a very, very, very high latency for your transatlantic packet, because it would be queued.
Apr
4
comment What is the difference between 127.0.0.1 and my assigned IPv4 address?
You can also have multiple addresses on an interface, FWIW.
Mar
23
comment Using ssh agent to sign a string
I'm voting to close this question as off-topic because it is about using a particular piece of software; you may have better luck over at Super User.
Mar
17
comment Is commuting via bicycle with a full-sized Samsung 17” laptop a good idea?
If the system's in sleep mode, shouldn't the drive be spun down with the head parked? AFAIK, the issue is if you move the system while awake; if you let it sleep and wait a second or two, it shouldn't be spinning (so gyroscopic effects won't matter).
Mar
16
comment Can a file be maliciously changed in a way that maintains its original SHA-1 Hash?
@OlivierDulac No, it has indeed never been done. There are no known SHA-1 collisions. The estimated cost is just an estimate - it's not that someone did it and this is how much we think it cost, it's that no one has done it but we think this is how much it would cost.
Mar
16
comment Can a file be maliciously changed in a way that maintains its original SHA-1 Hash?
@Aron No, that was not an example of a collision with a given file. With Flame, Microsoft had a licensing server that would sign X.509 certificates according to a certificate signing request, which means the attacker controls what is being signed within some limits. There was no preexisting certificate they found a collision with; Microsoft signed CSRs from customers as part of activation, which allows use of a collision attack (which is not a second-preimage attack).
Mar
16
answered Can a file be maliciously changed in a way that maintains its original SHA-1 Hash?
Mar
16
comment Can a file be maliciously changed in a way that maintains its original SHA-1 Hash?
How are you getting the hash value? From the download page, or some other way?
Mar
16
comment Can a file be maliciously changed in a way that maintains its original SHA-1 Hash?
Is there even a known attack on SHA-1 for collisions with a given file? I was under the impression that that attack hasn't been found for either MD5 or SHA-1 (there's just a collision attack, not a second-preimage attack)
Feb
28
answered Why don't touchpads have scroll wheels?
Feb
23
comment How long would it take to break a 1024 bit OpenPGP encrypted email?
There's no such thing as "a DES key of the same size as an RSA key." DES uses 56-bit keys, period. It is only defined with 56-bit keys; you cannot run DES with any other key size. It also isn't vulnerable to bad random numbers, because DES doesn't use random numbers at any point in the algorithm (nor does any other block cipher primitive); particular uses of it might include a random aspect (e.g. an IV for CBC mode must be random), but DES itself is fully deterministic. DES is also no longer used (triple DES is occasionally, but DES itself never). Are you sure you meant to talk about DES?
Feb
8
comment How to disable Wi-Fi on start up?
On some computers, there's also a hardware switch you could use.
Feb
8
comment Is there a benefit to using static IP addresses rather than dynamic ones for Wi-Fi access points within a large building?
Even in home setups, it's a good idea to do this: my house has multiple APs (big house, and the rooms we most often use are in corners) as well as a couple network printers, all of which have static IPs to ease configuration. With the APs, it makes it easier to go to a config page if there's an issue; with printers, it makes it easier to enter an IP address to add the printer to a computer.
Jan
25
asked Are laptop LCD cables interchangeable?
Jan
20
comment How many Ethernet Cable Drops per Room
+1 - it's expensive to retrofit them, so add them now.
Jan
19
comment Why am getting two IP address
@raz I flagged to go to Super User; AFAIK, Network Engineering is for more advanced networking questions.
Jan
19
answered Why am getting two IP address