206 reputation
14
bio website rsmith.home.xs4all.nl
location Netherlands
age
visits member for 1 year, 8 months
seen Jul 14 '13 at 17:12

Mechanical Engineer (Bachelor) from the Netherlands, specialized in composites design and manufacturing. Programming is both a tool I use for work and a hobby.


Sep
24
awarded  Autobiographer
Apr
21
awarded  Yearling
May
14
comment Using an MD5 hash as a password
There is the practical problem of correctly remembering and typing in a hexadecimal MD5 hash. Which means it will possibly end up on a post-it on the monitor...
May
12
comment Designing a security system from scratch with a custom protocol, suggestions needed
Regarding non-random IV in CBC-mode, see the answer to this question.
May
7
comment What's the difference between AES and earlier block ciphers?
@SmitJohnth What is your definition of an ideal block cipher?
May
6
comment How can scrypt be improved to counter GPU mining
Ask Colin Percival?
May
6
comment What's the difference between AES and earlier block ciphers?
@SmitJohnth If you want to encrypt more than one block with a block cipher, you need to use a mode of operation. Both block ciphers in the example above require a mode argument in their new() methods.
May
5
revised What's the difference between AES and earlier block ciphers?
Expand security comment.
May
5
revised What's the difference between AES and earlier block ciphers?
Use two block ciphers to compare.
May
5
revised What's the difference between AES and earlier block ciphers?
added 158 characters in body
May
5
answered What's the difference between AES and earlier block ciphers?
May
5
comment Is there any strong enough pen-and-paper or mind cipher?
I wonder how long it would take to do AES-256 with pen and paper? :-)
May
4
comment Can an Enigma-style cipher of sufficient complexity be considered secure in today's world?
Operational errors played a large part in breaking the enigma.
May
4
comment How can we reason about the cryptographic capabilities of code-breaking agencies like the NSA or GCHQ?
If the research is unpublished, how would you know it is first-class?
May
4
awarded  Supporter
May
2
answered Custom crypto library in C
Apr
22
awarded  Teacher
Apr
21
awarded  Editor
Apr
21
revised What is the best way to store sensitive information on the client?
Mention authentication. Mention virtual machines.
Apr
21
answered What is the best way to store sensitive information on the client?