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PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF. PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2.
José Álvaro Osorio Balvín (born 7 May 1985), better known by his stage name J Balvin, is a Colombian singer.He has been referred to as the "Prince of Reggaeton" (from Spanish: "Príncipe del Reguetón"), [2] [3] and is one of the best-selling Latin artists, with over 35 million records sold worldwide.