HYBRID CHRIPTOGRAPHY STREAM CIPHER AND RSA ALGORITHM WITH DIGITAL SIGNATURE AS A KEY
ABSTRACT: Confidentiality of
data is very important in communication. Many cyber crimes that exploit
security holes for entry and manipulation. To ensure the security and
confidentiality of the data, required a certain technique to encrypt data or
information called cryptography. It is one of the components that can not be
ignored in building security. And this research aimed to analyze the hybrid
cryptography with symmetric key by using a stream cipher algorithm and
asymmetric key by using RSA (Rivest Shamir Adleman) algorithm. The advantages
of hybrid cryptography is the speed in processing data using a symmetric
algorithm and easy transfer of key using asymmetric algorithm. This can
increase the speed of transaction processing data. Stream Cipher Algorithm
using the image digital signature as a keys, that will be secured by the RSA
algorithm. So, the key for encryption and decryption are different. Blum Blum
Shub methods used to generate keys for the value p, q on the RSA algorithm. It
will be very difficult for a cryptanalyst to break the key. Analysis of hybrid
cryptography stream cipher and RSA algorithms with digital signatures as a key,
indicates that the size of the encrypted file is equal to the size of the
plaintext, not to be larger or smaller so that the time required for encryption
and decryption process is relatively fast.
Penulis: Grace Lamudur Arta
Sihombing
Kode Jurnal: jptinformatikadd170421
