Zai, S.A.P., Debi Yandra Niska, Zulfahmi Indra, Kana Saputra and Adidtya Perdana 2025. Implementation of a Hybrid Cryptosystem Using ChaCha20 and ECC for Image Encryption in an Android Application . Sinkron : jurnal dan penelitian teknik informatika. 9, 4 (Oct. 2025), 1988-1997. DOI:https://doi.org/10.33395/sinkron.v9i4.15274.