What is digital signature (electronic signature)? - Definition from WhatIs.com

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Thursday, October 24, 2013
What is digital signature (electronic signature)? - Definition from WhatIs.com

How It Works

Assume you were going to send the draft of a contract to your lawyer in another town. You want to give your lawyer the assurance that it was unchanged from what you sent and that it is really from you.
  1. You copy-and-paste the contract (it's a short one!) into an e-mail note.
  2. Using special software, you obtain a message hash (mathematical summary) of the contract.
  3. You then use a private key that you have previously obtained from a public-private key authority to encrypt the hash.
  4. The encrypted hash becomes your digital signature of the message. (Note that it will be different each time you send a message.)
At the other end, your lawyer receives the message.
  1. To make sure it's intact and from you, your lawyer makes a hash of the received message.
  2. Your lawyer then uses your public key to decrypt the message hash or summary.
  3. If the hashes match, the received message is valid.

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Friday, August 3, 2012
Seven Selected Apps From Apple Store | Vol 92 | اختيارات آي-فون إسلام لسبع تطبيقات مفيدة

MiFare Classic Detection on Android

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Thursday, July 12, 2012
MiFare Classic Detection on Android

Updated: loading external data into an iOS PhoneGap app using jQuery 1.5

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Tuesday, July 10, 2012
Updated: loading external data into an iOS PhoneGap app using jQuery 1.5