(a)
Directive 1999/93/EC of the European Parliament and of the Council of 13 December 1999 on a Community framework for electronic signatures · European Union
the signature-creation-data used for signature generation can practically occur only once, and that their secrecy is reasonably assured;
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Source: EUR-Lex (Cellar) · retrieved 2026-10-28 · Text as adopted (Official Journal); later amendments are not incorporated in this text.