Zai, S. A. P., Debi Yandra Niska, Zulfahmi Indra, Kana Saputra, and Adidtya Perdana. “Implementation of a Hybrid Cryptosystem Using ChaCha20 and ECC for Image Encryption in an Android Application ”. Sinkron : Jurnal Dan Penelitian Teknik Informatika, vol. 9, no. 4, Oct. 2025, pp. 1988-97, doi:10.33395/sinkron.v9i4.15274.