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Like PKZIP and SecureZIP, PartnerLink is available on all major computing platforms.

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The SecureZIP Partner software provided to customers can only be used to communicate with its sponsoring organization. This new licensing structure guaranteed secure exchange between business partners. As an extension of SecureZIP, PKWARE customers could become 'sponsors' and provide an unlimited number of SecureZIP Partner utilities to the organization's business partners. SecureZIP PartnerLinkР”Р‡urther extending the PKWARE product family, PartnerLink was released in 2006. That key is then used with every encrypted file as part of the natural work flow. The contingency key is assigned to a trusted user in the organization. Contingency keys are necessary for audit review, or in the case of lost or stolen passphrases.

SecureZIP uses a contingency key in its Enterprise version of the software. Comodo certificates are still available with purchased copies of SecureZIP. PKWARE discontinued SecureZIP Express at the end of 2009. SecureZIP Express came with the option of receiving a Comodo digital certificate, good for one year. Р”Р‡or a brief period of time, PKWARE offered SecureZIP Express, a free version of SecureZIP available only on Windows Desktop, for non-commercial use. SecureZIP not only contained the same compression and passphrase protection as PKZIP but also introduced digital signature authentication and digital certificate-based encryption. SecureZIP was released in 2004 by PKWARE as an extension of PKZIP. New versions of PKZIP added strong encryption algorithms to accommodate security needs.

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A zip archive can be transferred among any of these platforms when creating and extracting with PKZIP. Since its creation, PKWARE has expanded support of PKZIP to Windows Desktop, Windows Server, UNIX, Linux, IBM i, and zSeries platforms. Originally, PKZIP was written as shareware for DOS. PKZIP was a faster alternative than ARC and was quickly adopted.

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Katz co-created the ZIP file format after a legal dispute with Software Enhancement Associates (SEA) over their ARC archiver. The name PKZIP comes from a combination of Phil Katz, the inventor, and ZIP, for the ZIP file format. PKZIP is a software utility that allows for the compression/decompression of multiple files and folders into a single archive. PKPAK (formerly known as PKARC) is a software utility for MS-DOS systems that allows the compression (and decompression using the PKXARC/PKUNPAK utilities) of multiple files into the ARC file format.

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An email address is required to download ZIP Reader from the PKWARE website. A second method is to simply select which file to extract from within the utility. To open an archive, the user can drag and drop the desired zip file over the program and it will extract. Any ZIP file can be opened with the reader program, regardless of where it was created. ZIP file format for all users, The APPNOTE provides developers a general description and technical details of the. This Application Note ensures continued interoperability of the.

PKWARE publishes an Application Note on the. In total PKWARE holds four patents, has over fourteen pending patents and is referenced in over eighty patents. ZIP files within the Windows file manager and Outlook. In 2005, PKWARE was awarded a patent for methods used to manage. In 20, PKWARE was awarded patents for patching technology used within PKZIP products. Phil Katz was granted a patent in September, 1991 for his efficient search functions used in the PKZIP compression process. Novacap Technologies and Maranon Capital, in partnership with management, acquire PKWARE SecureZIP extends to midrange and mainframe platforms SecureZIP is released for Windows Desktop, Windows Server, UNIX, and Linux Р”Р„warded PC Magazine's Editors' Choice for data compression software New management team, led by George Haddix and backed by investment-banking firm Grace Matthews, purchase PKWARE ZIP file format is introduced, first PKZIP version is released. Lawsuit from SEA over distribution of the PKARC utility. Phil Katz starts distributing the PKXARC utility.