One of the significant issues in information security areas is a hidden exchange of data. There are several techniques for this purpose such as cryptography, steganography, etc. Generally, in cryptography, the secret message content is scrambled. In another hand in steganography, the secret message is embedded inside the cover medium. In this paper, a new crypto technique-based ciphertext shifting algorithm has been designed to improve the security for our previous work that combining cryptographic and steganographic. The improvement in the security of the secret message is done by changing the ciphertext value. The proposed shifting algorithm is used to rearranges the location of each character of ciphertext based on key value, in which the final ciphertext length is equivalent to encryption value but it different in value. The key strength of this method is two side one is trick the attacker from notice any change in ciphertext which is the same length as the original, so when used the common cryptanalysis will not get anything due to the original ciphertext has been changed. The second key strength of this method is that the shifting value is variable and dependent on key length. This method is inspected to be a very strong technique that can prevent common cryptography attacks such as a dictionary or brute-force attacks, etc.

信息安全领域的重要问题之一是隐藏的数据交换。为此有几种技术，例如密码术，隐写术等。通常，在密码术中，秘密消息的内容被加密。在另一种隐写术中，秘密消息被嵌入封面介质中。本文设计了一种新的基于密码技术的密文移位算法，以提高我们之前结合密码术和隐写术进行工作的安全性。通过更改密文值来提高秘密消息的安全性。提出的移位算法用于基于密钥值重新排列密文的每个字符的位置，其中最终密文长度等于加密值，但其值不同。该方法的关键优势是两个方面：欺骗攻击者从密文中发现任何与原始长度相同的变化，因此，当使用普通密码分析时，由于原始密文已被更改，因此不会得到任何信息。此方法的第二个键强度是移位值是可变的，并且取决于键长度。经检查，此方法是一种非常强大的技术，可以防止常见的密码学攻击，例如字典或蛮力攻击等。