A private key is a unique identifier code issued to investors to be used as a digital signature during transactions. Compared to the public key that is clearly present in all digital currency transactions, the private key must be carefully maintained and not given to anyone. Your private key is the one that when an investor transfers currency to you, encrypts it with your public key. This public key is a “signature” to confirm your transaction. You need to keep your private keys like your credit cards or social security numbers.
For more information, read “Private key; Everything you need to know about private keys.