25 languages had used the documents" to investigate individuals and organizations associated with Mossack Fonseca. Security factored into a number of project management considerations. Saying "My life is in danger", John Doe insisted that reporters communicate over encrypted channels only and agree that they would never meet face-to-face. SZ also had concerns about security, not only for their source, the leaked documents, and their data, but also for the safety of some of their partners in the investigation living under corrupt regimes who might not want their money-handling practices made public. They stored the data in a room with limited physical access on air gapped computers that were never connected to the Internet. The Guardian also limited access to its journalists' project work area. To make it even harder to sabotage the computers or steal their drives, SZ journalists made them more tamper-evident by painting the screws holding the drives in place with glitter nail polish. Reporters sorted the documents into a huge file structure containing a folder for each shell company, which held the associated emails, contracts, transcripts, and scanned documents Mossack Fonseca had generated while doing business with the company or administering it on a client's behalf. Some 4.8 million leaked files were emails, 3 million were database entries, 2.2 million PDFs, 1.2 million images, 320,000 text files, and 2242 files in other formats. Journalists indexed the documents using open software packages Apache Solr and Apache Tika, and accessed them by means of a custom interface built on top of Blacklight. Süddeutsche Zeitung reporters also used Nuix for this, which is proprietary software donated by an Australian company also named Nuix. Using Nuix, Süddeutsche Zeitung reporters performed optical character recognition (OCR) processing on the millions of scanned documents, converting the data they contained to searchable and machine-readable text. Most project reporters then used Neo4J and Linkurious to extract individual and corporate names from the documents for analysis, but some who had access to Nuix used it for this as well. Reporters cross-referenced the compiled lists of people against the processed documents, then analyzed the information, trying to connect people, roles, monetary flow, and structure legality. US banking and SEC expert David P. Weber assisted journalists in reviewing information from the Panama Papers. Additional stories were released based on this data, and the full list of companies was released in early May 2016. The ICIJ later announced the release