Keamanan e bisnis

1. Pertemuan 7Sistem Keamanan dalam e-Bisnis
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2. Learning Outcomes
Pada akhir pertemuan ini, diharapkan mahasiswa
akan mampu :
•Menjelaskan sistem keamanan dalam e-bisnis
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3. Outline Materi
•PengamananInternet
•PenjualandiWeb
•Multimedia delivery
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4. Internet Network Architecture
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NAP
NAPNAP
NAPISPISP
ISP
ISP
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Backbone
© Prentice Hall, 2000

5. Internet Security
•Authenticity
–the sender (either client or server) of a message is who he, she or it claims to be
•Privacy
–the contents of a message are secret and only known to the sender and receiver
•Integrity
–the contents of a message are not modified (intentionally or accidentally) during transmission
•Non-repudiation
–the sender of a message cannot deny that he, she or it actually sent the message
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6. 6MessageTextCipheredText
Message
Text
Sender
Receiver
EncryptionDecryption
Private Key
Private Key
•Private Key Encryption (Symmetrical Key Encryption)
•Data Encryption Standard (DES)is the most widely used symmetrical encryption algorithm
Encryption

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Message
TextCipheredTextMessageText
Sender
ReceiverEncryption
Decryption
Public Key of
Recipient
Private Key of
Recipient
–Public Key Encryption (Asymmetrical Key Encryption)
Encryption(cont.)

8. –Digital Envelope —combination of symmetrical and public key encryption
8MessageText
Ciphered
TextMessageText
Sender
ReceiverEncryption
Decryption
Session KeySession Key
Public key of
Recipient
Public key of
Recipient
Session Key
Session KeyDigital EnvelopEncryption(cont.)

9. 9MessageText
Message
TextSender
Receiver
EncryptionDecryption
Public Key of
Recipient
Private Key ofRecipient
–Digital Signatures : Authenticity and Non-Denial
Signature
Signature
Private Key of Sender
Public Key of SenderCipheredTextEncryption(cont.)

10. Penjualan di Web
•Function Requirements for an Electronic Storefront
–Search for, discover, and compare products for purchase
–Select a product to be purchased and negotiate or determine its total price
–Place an order for desired products
–Have their order confirmed, ensuring that the desired product is available
–Pay for the ordered products (usually through some form of credit)
–Verify their credit and approve their purchase
–Have orders processed
–Verify that the product has been shipped
–Request post-sales support or provide feedback to the seller
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11. Penjualan di Web
•Electronic storefront must contain:
–A merchant system or storefront that provides the merchant’s catalog with products, prices and promotions
–A transaction system for processing orders and payments and other aspects of the transaction
–A payment gateway that routes payments through existing financial systems primarily for the purpose of credit card authorization and settlement
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12. Multimedia Delivery
•Webcasting—describes Internet-based broadcasting of audio and video content
–Types of Webcasts
•Text Streams—Text-only wordcasts and datacasts
–to deliver constant news and stock price updates
•Ambient Webcasts—Video content
–is captured from a Webcam and delivered as single-frame updates that are transmitted at periodic intervals
•Streaming Audio—Web equivalent of radio
–to deliver everything from talk radio to sports broadcasts to music previews to archived music and radio shows
•Streaming Video
–to deliver videoconferences where high quality images are not required and there is not much movement among participants
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13. •Works in a straightforward way
•Examples of companies offering both Webcast servers and players
–RealNetworks ( www.real.com)
–Liquid Audio ( www.liquidaudio.com)
–Xingtech with its streamworks technology ( www.xingtech.com)
–Apple with its QuickTime system ( quicktime.apple.com)
–Microsoft with its Netshow software (www.microsoft.com/windows/windowsmedia)
•Multicasting
–stream a Webcast from a central server to other media servers which are distributed to different locations
–when a listener or viewer clicks on a Webcast link they are automatically routed to the closest server
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Webcasting