# Increasing rounds in DES, increases or decreases the security?

I was wondering whether in DES,
if we used more than 16 rounds, the security of the message was increased or actually decreased?
(disregarding the decreased speed of execution / computation.)

• @fgrieu thank you for your immediate response! would you care to elaborate on that? – solid.py Oct 23 '17 at 18:48
• forget about my comment, sorry – fgrieu Oct 23 '17 at 19:18

Short answer, it increases the security.

The fundamental problem with regular DES is the number of bytes used for the key. It is too low to be considered secure* (with the level of computational power it currently exist, it is feasible to brute force through DES encryption).

Try checking out 3DES article on wikipedia for more info on a better implementation of DES:

https://en.wikipedia.org/wiki/Triple_DES