Hacking C code vs D code

[pascal111 via Digitalmars-d-learn]

One of problems faced me in C programming is hacking data with C 
code that some hackers do with C code which make me needs more 
tools to protect my C code, but I don't have good resources in my 
current time, while I noticed that D code is more secure than C 
code by mean it will be more useful to do my codes in my current 
time.

My question is, to which extent D code is secure and helping in 
protect data?