This paper present s a new image encryption model with focus on symmetric key schemes. It discus 5 schemes: Random Generation Key (8B); Random Key Generation part A(4B) and part B(4B); Input User Key (4B), Encrypted key and Random Key generation (4B); Random Key Generate (4B) and Input User Encrypted Key (4B); Input User Key (8B). Experimental results are based on image encryption by DES algorithm (5 instances) and by AES algorithm (5 instances). A table with image quality values and a table with complex arithmetic mean error are done.