Abstract
Nowadays a letter can easily be falsified and used for things that are not appropriate. Budi Luhur University has a work unit that serves student requests for certificate of active students and certificate of graduation. Students need that certificate for apply a job or get a scholarship. To prevent the falsification of letters, a system using PHP programming language and MariaDB database was used to verify the letters. The certificate released by this system will be equipped with a QR Code containing the URL with parameters that have been encrypted with the cryptographic method AES-192. If accessed, this URL will display the data number, name, letter number and date of the letter. The recipient letter can verify the authenticity of the letter by comparing the data in the letter with the data in the system. If the two data are the same, the letter is the original. Based on test results, this system can be used to guarantee the authenticity of a letter.
Highlights
Crimes regarding falsification or abbreviated as crimes of forgery are crimes in which they contain an element of an untruth or false state or an object, something that appears from the outside as if it is true even though it is true. contradicts the truth (Ismail, 2018)
This certificate is equipped with a QR code containing a URL with parameters that have been encrypted with the Advanced Encryption Standard (AES)-192 cryptographic method
The purpose of this research is to build an application to print graduation certificates and active student statements equipped with a QR code that has been encrypted with AES-192 to verify the authenticity of the letter
Summary
Crimes regarding falsification or abbreviated as crimes of forgery are crimes in which they contain an element of an untruth or false state or an object, something that appears from the outside as if it is true even though it is true. contradicts the truth (Ismail, 2018). To prevent the forgery of this certificate, a system was created using the PHP programming language and the MariaDB database which is useful for securing letter This certificate is equipped with a QR code containing a URL with parameters that have been encrypted with the AES-192 cryptographic method. The purpose of this research is to build an application to print graduation certificates and active student statements equipped with a QR code that has been encrypted with AES-192 to verify the authenticity of the letter. Previous research entitled Development of Certificate Authentication Authentication Method Using QR Code Images made an application for letter security. The research entitled Implementation of AES 256 Cryptographic Algorithm and LSB Steganography Method on Bitmap Images creates a security application for image files. This application can restore files that have been encrypted to be like before (Pramusinto, Wizaksono, Saputro, 2019)
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