Presentation on theme: "Security Controls and Systems in E-Commerce"— Presentation transcript:
1 Security Controls and Systems in E-Commerce Prof. Mohamed Aly Aboul - DahabHead of Electronic and communications Engineering DepartmentArab Academy for Science , Technology and Maritime TransportITU E - Commerce Conference for the Arab RegionTunisia, May 2001
2 I. Introduction What is E - Commerce ? Actors of E - Commerce: Product.Player.Process.Scope of E - Commerce:Infrastructure.Pillars.Applications.
3 I. Introduction (Cont’d) Security of E - Commerce involves:Security controlSecurity systems
4 II. Security Controls 1- Confidentiality. 2- Access control. 3- Integrity.4- Availability.5- Non repudiation.
5 II. Security Controls (Cont’d) 1- Confidentialityit refers to the protection of information from unauthorized agent or person.It can be guaranteed by encrypting the data.
6 II. Security Controls (Cont’d) 2- Access controlThere should be some sort of control of any entity (human or computer) trying to access the E - Commerce system.It includes two measures : authentication and authorization.
7 2- Access Control (Cont’d) Authentication : The sender of a document must be identified precisely and without any possibility of fraud.Authorization: not all the users can have access rights to the E- Commerce system.
8 II. Security Controls (Cont’d) 3- IntegrityIt refers to protecting the data and / or computer against any tampering [nationally or internationally).Measures are taken to ensure the accuracy and completeness of data.
9 II. Security Controls (Cont’d) 4- AvailabilityIt refers to the continuity of the processing and the availability of information.5- Non repudiationIt ensures that users cannot deny actions they undertake.
10 III. Security Technologies The categories of security technologies are:-1- Platform security.2- Network security.3- Encryption and certificate authority.
11 III. Security Technologies (Cont’d) 1- Platform securityIt refers to security of information contained in the computers or servers.The objective is to ensure that information on the platform is secured from unauthorized users or other platforms.
12 III. Security Technologies (Cont’d) 1- Platform securityIt can be done on three levels:User access to operating system.User access to the database.User access to the business applications and internal browser.This can be carried out by using passwords and ID numbers at each level.
13 III. Security Technologies (Cont’d) 2- Network SecurityIt refers to the security of all traffic at the network levels.It involves two aspects:the two communicating platforms should authenticate each other.The information has to be preserved confidentially over the network.
14 III. Security Technologies (Cont’d) 2- Network SecurityThe techniques utilized are :a) IP security protocol.b) Point to point tunneling protocol.c) Remote authentication Dial In user service.d) Firewalls.
15 2- Network Security (Cont’d) a) IP security protocol:The two hosts ( or platforms ) establish a security association between them.A sequence of bits called “key” is added to the information packets.Checksum operations are made on the entire packet (including the key). These operations follow certain rules or “algorithms”.
16 2- Network Security (Cont’d) b) Point to point tunneling protocolIt is a protocol that allows establishing a secure channel between the two hosts then communicating the information.c) Remote Authentication Dial In user serviceIt is a protocol that enables a host to authenticate dial in users before allowing them to convert to the internet service.
17 2- Network Security (Cont’d) d) FirewallsThese are filters that control access to the internal network of the system.They examine the packet contents and accept or reject the routing, of packets based upon the contents.They are “hardware” components that are implemented from a combination of routers, hosts. computers, servers,……. etc.
18 III. Security Technologies (Cont’d) 3- Encryption and Certificate AuthorityThis refers to encryption of information itself.The encryption process needs a sequence of bits called “key” and a mathematical process called “algorithm”.There are several types of encryption, namelya) Private key encryptionc) Public key encryptiond) Digital signaturee) Certificate authority
19 3- Encryption and Certificate Authority (Cont’d) a) Private key encryptionSame key is used to both encrypt and decrypt the message.It should be known to both sides.Difficulties are:message is communicated between users that have never met.If so many users hold the same key, it will no longer be private.
20 3- Encryption and Certificate Authority (Cont’d) b) Public key EncryptionTwo keys are used : a public key to encrypt the message and a private key to decrypt it.The public key is made available to anyone who wants to send a message.The only way to decrypt the message is to hold a private key.
21 3- Encryption and Certificate Authority (Cont’d) e) Digital SignatureIt is used to make sure that the message is coming from the person you think sent it.It is also used to make sure that the person cannot deny he or she has sent the message.
22 e) Digital Signature (Cont’d) Digital signature is done as follows:The sender has two keys : one “private” for encryption and the other “public” for decryption.The sender creates a phrase and encrypt it with his private key.The phrase is attached to the message and both are encrypted by a public key.The phrase is decrypted with a public key, if it is successfully decrypted, then the sender himself has sent it.
23 3- Encryption and Certificate Authority (Cont’d) d) Certificate Authority (CA)It is a third party which ensures that no body can steel the private key and send the message.The role of certificate authority is done as follows:
24 d) Certificate Authority (Cont’d) Individuals (or computers) apply for “Digital Certificate” from certificate authority by sending their public key and identification information.Certificate authority verifies information and creates a certificate that contains the applicant public key and identifying information.
25 d) Certificate Authority (Cont’d) The Certificate Authority uses its private key to encrypt the certificate and sends it to the applicant.The applicant uses the Certificate Authority public key to decrypt the certificate and sends it. He will use the embedded public key to send the message.
26 3- Encryption and Certificate Authority (Cont’d) e) Biometricsthere are seven categories of biometrics, namely finger scanning, face recognition, hand geometry, iris and retina scanning, voice recognition, palm-print recognition, and signature recognition.Special hardware should be used e.g. finger print scanners and camera- based iris recognition.
27 IV. ConclusionSecurity is an issue of prime importance to E- Commerce.Security controls for E-Commerce have to be laid down.Security technologies can be applied on three levels: platform, network and message encryption.
28 References:1) Me Garr, M.S., “ Tuning in Biometrics to Reduce E-Commerce Risk”, EC-World magazine, Feb.2000.2) Turbin, E, et.al, “Electronic Commerce- A perspective”, Prentice Hall Inc.,2000.3)Rajpnt,W.E., ”E-Commerce systems Architecture and Applications”, Artech House,2000.