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A HYBRID ENCRYPTION ALGORITHM BASED ON AES-RSA 

 

Süheyla BƏHLULZADƏ  

Qafqaz Universiteti 

[e-mail]

 

 

Abstract - To improve the security of message transfer a new hybrid algorithm system is proposed. AES algorithm is used 

for encrypting the message, because of its high speed; AES algorithm is considered one of the best for encrypting the long 

messages, datas. The key of AES will be encrypted with RSA, because its high secure and advantages in key cipher. Still 

the procedure of encryption is simple and takes small amount of time as in AES. 

Introduction  - Today, various cryptographic algorithms have been developed. These are broadly classified as symmetric 

key (DES, TDES, Blowfish, CAST, IDEA, RC4, RC6, AES) and asymmetric key (RSA, ECC) algorithms. These 

algorithms are used in reliable communication, e-commerce, e-banking, reliable e-mail communication and etc. The prime 

requirements for any e-commerce and m-commerce transactions are Privacy, Authentication, Integrity maintenance and 

Non-Repudiation. Cryptography helps us in achieving these prime requirements. 

Secure and saving time is the most important factors for consumer in sending data. In symmetric key algorithms same key 

are used for encryption and decryption, while in asymmetric key algorithms one key is used for encryption, another for 

decryption (but these keys are related to each other).  Asymmetric key algorithms are disadvantageous when we want to 

encrypt a long plaintext, because it takes much time. Symmetric key algorithms are disadvantageous, when two people want 

to send message to each other, because the key can be found by third person.  In these cases hybrid cryptosystems are the 

most favorable. In this paper we introduce a hybrid cryptosystem based on AES and RSA.