1,650 reputation
1315
bio website f-hauri.ch
location Switzerland
age 49
visits member for 1 year, 11 months
seen Oct 18 at 7:04

I'm an old open-source independent hacker,

concerned about concepts of ethical hacking, teaching and sharing.

I like to play with shell, perl, lisp (sometime), sed and lot of other languages/environments.

Co-system administrator in several configurations, after various SMEs, I like to sometimes take time to focus on methods that I can improve or re-create (for example to change the level of abstraction).

In this, surfing on differents StackExchange's sites is a good way to boost my inspiration!


Mar
10
comment Can a Ubuntu live usb be infected with spyware/ virus?
@ask if your original iso is ubuntu-13.10-desktop-i386, the md5sum of this file must be 5765805c23215de23f7775d84a79e140
Mar
10
comment Can a Ubuntu live usb be infected with spyware/ virus?
@aks No, yes, but no: You could effectively re-create same iso, meaning same behaviours, but it's a little complicated because of boot-image syntax. And even, you're new iso will retain meta informations like creation date, ensuring md5sum won't match. The right solution is to compare md5sum.txt on both keys and run md5sum -c <md5sum.txt from usbkey root path (in md5sum.txt path are relative).
Mar
10
comment Can a Ubuntu live usb be infected with spyware/ virus?
Once you cd (change dir) to the root of your mounted usb. md5sum <md5sum.txt take the content of file md5sum.txt and check each file. At end, md5sum return result code $?==0 if all files was checked without corruption. So with && the command echo will be run only if previous command return RC=0.
Mar
10
comment Does reinstalling ubuntu eliminates all existing rootkits/ malware/spyware/ virus etc?
Switching power off before booting from CD is not very time expensive! (And could maybe prevent warm-boot issues)
Mar
10
comment Outsourcing software development and its effect on security
Outsourcing security is already what you do when buying firewall and/or vpn propretary solution (like cisco).
Mar
10
revised Can a Ubuntu live usb be infected with spyware/ virus?
Add step-by-step explanation
Mar
10
comment Can a Ubuntu live usb be infected with spyware/ virus?
@user2917687 have a look at my edit.
Mar
10
revised Can a Ubuntu live usb be infected with spyware/ virus?
Add step-by-step explanation
Mar
10
comment Can a Ubuntu live usb be infected with spyware/ virus?
@user2917687 Yes! But you may have to check files, not whole partition! (depending on how iso are copied to usb, partition may present same checksums too)
Mar
9
comment Can a Ubuntu live usb be infected with spyware/ virus?
If checksums differ, detection is done: The two keys are not same! :-/ From there, you could try to search for differences and try to explain what/why ( maybe who ;)
Mar
9
answered Can a Ubuntu live usb be infected with spyware/ virus?
Feb
3
comment Does including the username in a password make it less secure?
Brute force and password db are not the only way used by attackers! Adding 1 bit of entropy by adding many keys to hit improve the chance you mis and re-type, this improve the chance an attacker watching your move understant thems.
Feb
1
comment Is it really secure to store API keys in environment variables?
Try command ps axefw or ps axefwww...
Jan
22
awarded  Popular Question
Jan
21
awarded  Nice Question
Jan
20
comment Why check to see if a password is already used by another user?
Why did you not try to write you're own free translation of this?
Jan
20
revised Reasonable way to store encrypted passwords in a webapp's database, Linux
added 650 characters in body
Jan
20
answered Reasonable way to store encrypted passwords in a webapp's database, Linux
Jan
20
comment How can I recover a GPG private key from a PC which has died?
This question is about applications files management, not about security. @cam: Thank for feedback anyway;-)
Jan
19
accepted Why check to see if a password is already used by another user?