digital signature

من یه اطلاعات جزئی از نحوه عملکرد الگوریتم های hashing دارم.احتمالا Security Bulletin های microsoft رو دیدید. اونها یک چنین حالتی دارند:

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Hash: SHA1

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Title: Microsoft Security Bulletin Minor Revisions

Issued: July 6, 2005

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Summary

=======

The following bulletins have undergone a minor revision increment.

Please see the appropriate bulletin for more details.

...

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می خواستم بدونم اون کدی که به عنوان PGP SIGNATURE اورده شده ، چیه؟

http://www.sendmail.org/pgp.html

جناب houtanal دستت درد نکنه . اینم برای کسانی که دوست دارند بیشتر بدونن:

http://www.pgpi.org/doc/overview

Introduction
PGP (short for Pretty Good Privacy) is a public key encryption program originally written by Phil Zimmermann in 1991. Over the past few years, PGP has got thousands of adherent supporters all over the globe and has become a de-facto standard for encryption of email on the Internet. If you don't know whether PGP is something for you, please take some time to read Phil Zimmermann's article on why you should use PGP and this document on how PGP works. Adam Back has written this history of PGP.