Khác biệt giữa các bản “Chữ ký điện tử”

* [http://www.pgpi.org/doc/guide/7.0/en/intro/ Introduction to cryptography] from the PGP international website
* [http://specs.openoffice.org/appwide/security/Electronic_Signatures_and_Security.sxw OpenOffice Electronic Signatures and Security specification (OpenOffice format)], also in [http://bcn.boulder.co.us/~neal/i2/OpenOffice_Electronic_Signatures_and_Security.pdf pdf format]. Incorporates standards for document format and XML Digital Signatures. Includes a comparison of document signature software and features from Adobe (Acrobat), Microsoft (Word) and Mozilla.
* [http://chukyso.info/] chu ky so
 
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