PENERAPAN ALGORITMA AFFINE CIPHER DAN REED–SOLOMON CODE UNTUK PENGAMANAN DAN PEMULIHAN DATA PADA CITRA DIGITAL
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Abstract
The exchange of digital image data over public networks faces dual vulnerabilities: the risk of interception and data corruption due to signal noise. Conventional encryption often addresses only confidentiality, lacking recovery mechanisms if the encrypted data is damaged. This study proposes a hybrid system integrating Affine Cipher for encryption and Reed-Solomon Code for integrity protection. Digital images are encrypted using a linear substitution function, then processed with a Reed-Solomon encoder to insert parity bytes. Test results demonstrate that the proposed method secures visual information and restores the original image to a lossless state, even if the encrypted data suffers noise or bit corruption up to a specific tolerance limit. This combination provides an effective security solution guaranteeing both confidentiality and data availability during image transmission
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