<p>This paper introduces a secure and efficient hybrid scheme based on polar codes, called as HES-PC. The proposed HES-PC contains of two other mechanisms: (i) a key encapsulation mechanism based on polar codes, called as KEM-PC; (ii) a data encapsulation mechanism based on polar codes, called as DEM-PC. In fact, the symmetric key is exchanged between the legitimate partners by exploiting the KEM-PC. Also, secure polar encoding/successive cancelation (SC) decoding is enhanced between the honest parties by using DEM-PC. Moreover, by exploiting the characteristics of polar codes, the key sizes of KEM-PC and DEM-PC are reduced significantly. To decrease the key sizes of KEM-PC and DEM-PC, new approaches are proposed to store a little sub-channel indices in lieu of storing the generator matrix of applied polar code. Also, the security analyses demonstrate that the polar code-based HES has a proper security level opposed to the usual attacks. In reality, reducing the length of secret key in KEM-PC and DEM-PC has no influence on the level of security in the HES-PC. The aforementioned properties makes HES-PC to be usable in the secure communication devices and protocols.</p>