Can a person lie in order to keep something safe or hidden or to protect something which will benefit him? For example, once I was in a shameful situation with a kufar girl, and I lied to her in order not be a subject of a joke; is this ok?
Or for example, I have 1000€ and I plan to build a house and I don't want to give my money to anyone, and if someone ask me to give him or her 1€ then I say I don't have it. Is this ok?