Essay on Computer And Networking ( Level 7 )

3155 Words Oct 25th, 2014 13 Pages
Diploma in computing & networking (level 7) Assessment W1: Cryptography Prepared By: Karanjot Singh Deol

Table of Contents 1
Task 1: Cryptography- their methods to do and how it used in IT environment: 1
Cryptography 1
Methods of doing cryptography: 2
Symmetric key Encryption 2
Asymmetric Keyencryption 3
How to secure our encrypted data: 4
Integrity: 4
Overview of cryptography: 6
Conclusion: 6
Task 2: Applications of cryptography in Electronic Transactions and VPNs 7
Cryptography in VPNs 7
Secure Electronic Transactions 9
Task 3: Windows and their authentication methods from NT to Latest Windows Environment? 10
Authentication: 10
Types of authentications: 10
Types of authentication Protocols: 11
Task 4: What is Kerberos Protocol? How it works inside in a LAN. 12
Kerberos: 12
How it works inside in a LAN? 13
References: 15

Task 1: Cryptography- their methods to do and how it used in IT environment:

Before start we have to know about that there are three major components of network security:
Confidentiality (Encryption/authentication)
Integrity (hashing)
Availability (Fault tolerance/HA)
And also data present in the network is having two types: Rest and motion. Data present in the hard disks on the computers is called data is in rest form and data that is moving across the network in the form of packets is called as motion form. So for the security…

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