Methods and apparatus, including computer program products, implement techniques for performing digital signature operations on electronic content. An electronic document includes a digital signature module. The electronic document is accessed using a user application. The digital signature module is used to perform one or more digital signature operations on the electronic document in the user application.

 
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< Method for indivisibly modifying a plurality of sites in a microcircuit card non volatile memory, in particular a contactless card

> User-guided error correction

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