we should do these transfers with those whom we trust or via some security measures
Ok, well we definitely know you have no trust here.
That only leaves the "security measures" you speak of. Again, we'd love to know what you mean by that.
My dear friend if i am a newbie here it doesn't matter and it doesn't define that i am not trusted
,and i am claiming either here to trust me or not , I Just gave a thought here about my experiance ,as i have been dealing with many people usualy on skype or fb .
I use to take Several measures , Like i use to talk to the person whom i am dealing with.
Next thing i do is verify his name with his paypal account via screenshot and source of his paypal and payments he have made , and also his location.
and also i dont take creditcard payments coz they can be easily reversed even if they are friend n family payment which cant be disputed.
these are the serious measures i use to take
and will prefer that everyone should take.