| dc.description.abstract | The condition of the world experiencing the COVID-19 pandemic has resulted in some daily activities limited by health
protocols. The Indonesian government's policy in the academic field has forced STIE Mandala Jember, as one of the
private universities, to implement online-based new student admissions. The registrant's identity must be kept
confidential during the online-based new student registration process, so the running system needs an identity coding
(encryption) process. Hill Cipher is a cryptographic algorithm that utilizes the multiplication of matrix inverse
operations. In ordinary Hill Cipher, to encrypt the entire plaintext, a key is needed. In this paper, we will modify the
Hill Cipher named Hill Cipher Chain. The process of chained Hill Cipher will encrypt and decrypt the primary key
based on the previous character. Firstly, we will encrypt the primary key with the key from the next column of the
database. In this case, we use the name column. The encryption result will be used as a key for the subsequent character
encryption. Implementation of this method makes the difficulty level of decryption more complex than the ordinary Hill
Cipher, which only uses one key for all so that the security of the data obtained is also getting better. | en_US |
