?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Syifa+Fatmawati&rft.au=Syifa+Fatmawati%2C+-&rft.aufirst=-&rft.inst=Universitas+Pendidikan+Indonesia&rft.date=31+December+2025&rft.title=ENKRIPSI+TERAUTENTIKASI+DENGAN+CHACHA20+DAN+HASH-BASED+MESSAGE+AUTHENTICATION+CODE+SECURE+HASH+ALGORITHM+256&rft.degree=S1