Are programs/OSes written in D more secure than programs written in C/C++?

Paulo Pinto pjmlp at
Thu Jun 7 02:18:05 PDT 2012

On Wednesday, 6 June 2012 at 22:04:27 UTC, J.Varghese wrote:
> I'm sure most of you have heard of the recent increase of high
> profile hacking and security violations. The PlayStation 
> Network,
> RSA, LinkedIn, (today) and thousands of lower profile attacks.
> The Flame trojan also marks the rise of highly sophisticated
> state-sponsored cyberweapons.
> I'm not a programmer, so can someone explain this to me: Will
> programs and operating systems written in D be safer (I speak of
> both memory safety and security bugs) than existing operating
> systems written in C and C++? If so, what features and 
> attributes
> of D make this the case? How much safer is it? Would it be
> possible to identify all the bugs in an OS written in D (within 
> a
> reasonable timeframe) or is that still a pipedream?
> Thanks for replying. I have followed the development of D for a 
> while. I just want to know how much safer D is than other 
> languages. Curiosity and all that.

D has a few language features that help to minimize exploits:

- slices
- bounds checking
- more restrict type checking
- GC
- reference parameters
- proper strings
- security layers among modules (system, trusted, safe)

Most C and C++ security exploits are due to:

- pointer arithmetic
- null terminated strings
- lack of bounds checking on array access
- usage of pointers to change input arguments

Sure enough, static analysis tools can help, but not everyone 
use of them. Note that C++ library can help, but requires that 
the developers
play by the rules.

But no language is 100% full proof. You still need to take care 
is properly handled (SQL, passwords, etc) and if the OS does not 
the proper security mechanisms, you can still tweak the assembly 


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