3,091 reputation
620
bio website
location Curitiba, Brazil
age 35
visits member for 3 years, 5 months
seen Dec 18 at 13:00

Computer analyst


Jul
12
comment How exactly is MD5 vulnerable to collission attacks?
@caesarsgrunt : take a look at en.wikipedia.org/wiki/Cryptographic_hash_function#Properties . What you ask is the second pre-image attack. This answer was about the collision resistance...
Jul
12
comment How exactly is MD5 vulnerable to collission attacks?
glad to help, but the first answer (oleksi) explained it all.. I just remembered the example and googled it :).
Jul
12
comment How exactly is MD5 vulnerable to collission attacks?
see th.informatik.uni-mannheim.de/people/lucks/HashCollisions/… and th.informatik.uni-mannheim.de/people/lucks/HashCollisions/… : both have the same md5, both are very different...
Jul
12
answered How exactly is MD5 vulnerable to collission attacks?
Jun
28
comment Are services like “LastPass” less secure, as they have all my passwords protected by a single password?
@Sid that was just some irony, and a tought one because... well, sometimes users never look after the policies :-)
Jun
28
awarded  Yearling
Jun
27
comment Is it possible to write shellcode in C++?
@lynks this answer (and yours, and lot of others) made me go to the law school, and have "computers" as a whole just as a hobby...
Jun
27
comment How secure is ionCube compiled code?
I don't think so, but never tryed that program... and given your questions, and how much that security would mean to you, I'd go with some external hardware (java card, basic card) that would process part of the task, and access it from php or from any other language + php exec().
Jun
27
comment How secure is ionCube compiled code?
in general, it isn't that easy to read the code that a decompiler produces, since the "compilation" process of PHP + ioncube will produce some optimizations. Your costumer won't have a nice, easy to read and understand, code. But he can hire someone that will understand the bytecode, or the assembly code...
Jun
25
answered How secure is ionCube compiled code?
Jun
25
comment Encrypt-function inside PHP code that you have to publish
@rubo77 ops, not exactly. Now that you explained a little better your problem, take a look at those hardware solutions. Reseach a bit about Java Cards, for example: you could make the encryption part of your system happen inside it...
Jun
25
answered Encrypt-function inside PHP code that you have to publish
Jun
21
answered Can unencrypted email be read or altered while it is in transit?
Jun
12
revised Secure wiping of EEPROM and flash memory
edited body
Jun
11
answered Secure wiping of EEPROM and flash memory
Jun
7
answered User specified iteration count
Jun
7
comment How to know, in Windows XP, if files were copied, deleted or moved from a pendrive?
@LenaQueen had sucess ?
Jun
7
comment Composition of passwords
@Mok-KongShen : don't think so, at least thinking in brute-force attacks. But it's not that hard to construct such partial dictionary, harvesting texts form internet... The brute-force program would also be customized to take advantage of such custom dictionary.
Jun
6
revised What are the vulnerabilities of reusing passwords for generation of keys and encrypted files?
added 4 characters in body
Jun
6
answered What are the vulnerabilities of reusing passwords for generation of keys and encrypted files?