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Information security - Time-stamping services - Part 2- Mechanisms producing independent tokens. Original standard ISO IEC 18014-2-2021 in PDF full version. Additional info + preview on request

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Information security - Time-stamping services - Part 2- Mechanisms producing independent tokens - Technical Corrigendum 1. Original standard ISO IEC 18014-2-2021 cor1-2024 in PDF full version. Additional info + preview on request

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Information technology - Security techniques - Time-stamping services - Part 3- Mechanisms producing linked tokens. Original standard ISO IEC 18014-3-2009 in PDF full version. Additional info + preview on request

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Information technology - Security techniques - Time-stamping services - Part 4- Traceability of time sources. Original standard ISO IEC 18014-4-2015 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Mapping functions for the employment of Virtual Private Network scenarios. Original standard ISO IEC 18017-2001 in PDF full version. Additional info + preview on request

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Information technology - User interfaces for mobile tools for management of database communications in a client-server model. Original standard ISO IEC 18021-2002 in PDF full version. Additional info + preview on request

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