211 reputation
13
bio website robnapier.net
location Raleigh, NC
age 41
visits member for 2 years, 6 months
seen Mar 28 at 1:15

Rob is a builder of treehouses, hiker, proud father, and in his spare 50-60 hours a week, a Mac and iPhone developer. He's coauthor of iOS 6 Programming Pushing the Limits. Cocoaphony is where he pontificates on various issues fascinating to Cocoa developers, and occasionally other topics of technical interest. You can find more information about him on LinkedIn. Or mail him at robnapier on gmail. Now and then he tweets at @cocoaphony.


Jan
17
awarded  Informed
Jan
15
comment With PBKDF2, what is an optimal Hash size in bytes? What about the size of the salt?
Given the low security cost of reusing an occasional PBKDF2 salt, the cost to the entropy pool of generating an extra 8 random bytes (and the memory and disk cost to store them), is 128 bits really worth it over 64 bits? Would adding a constant "purpose" string to the salt achieve the goal even better? (I know this is a bit nit-picky; it's just something I've been thinking through recently and was looking for other opinions.)
Oct
4
awarded  Yearling
Oct
1
comment How a malware executes remote payload
Plus also directly interpreting it (performing actions directly based on the payload), or passing it to another tool to interpret (such as bash or python).
Oct
1
answered How a malware executes remote payload
Jan
31
awarded  Teacher
Jan
31
answered How to encrypt a password stored in a database (need to decrypt later)
Oct
4
awarded  Supporter