Recently there is an increasing technological development in intelligent tutoring systems.
This field has become interesting to many researchers. In this paper, we present an …

Abstract Intelligent Tutoring Systems (ITS) has a wide influence on the exchange rate,
education, health, training, and educational programs. In this paper we describe an …

Lately there is more attention paid to technological development in intelligent tutoring
systems. This field is becoming an interesting topic to many researchers. In this paper, we …

Hill Cipher is one of the classic symmetric encryption algorithms widely used in cloud data
security. Although the hill cipher principle is relatively simple, its key matrix must be …

The Hill cipher algorithm is one of the symmetric key algorithms that have many variations
but still not suited for all zeroes plaintext block. Chosen-plaintext attack can be possible on …

Cryptography is one of the most important sciences today because of the importance of data
and the possibility of sharing data via the Internet. Therefore, data must be preserved when …

Information security (IS) is essential and important in different application fields. Medical
databases (MD) and healthcare applications (HA) are not an exception; information security …

Many classical cryptosystems are developed based on simple substitution. Hybrid
cryptosystem using byte substitution and variable length sub key groups is a simple …

Derivations on ranked bigroupoids Page 1 Appl. Math. Inf. Sci. 7, No. 1, 161-166 (2013) 161
Applied Mathematics & Information Sciences An International Journal c © 2013 NSP Natural …

The probabilistic encryption produces more than one ciphertext for the same plaintext. In this
paper an attempt has been made to propose a probabilistic encryption algorithm based on …