Unit15 - Organisational System security
Task 2
Task 3
Operation and use of encryption methods
SSL;
Explanation/operation
SSL(Secure socket layer) is a set of protocols designed to allow communication over a network e.g. the internet; securely, by authenticating to and from the server e.g. a web server in case of web browsing to make sure the user ...
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Task 2
Task 3
Operation and use of encryption methods
SSL;
Explanation/operation
SSL(Secure socket layer) is a set of protocols designed to allow communication over a network e.g. the internet; securely, by authenticating to and from the server e.g. a web server in case of web browsing to make sure the user knows who they are connecting with.
SSL works by requesting a digital certificate from the web server, this ensures that the server the user is connecting to is who it says it is. After decrypting the certificate and matching it with web servers details it will complete the connection, only if both sets of details match.
Usage
Uses for encryption techniques such SSL is to transmit data safely over a network to prevent them being intercepted, but if they are intercepted to stop people from reading the data. E.g. uses include encrypting bank details when purchasing or viewing services such as online banking.
Caesar cipher
Explanation/operation
A Caesar cipher is a form of encryption that works by replacing fixed letters of the alphabet with an alphabet that has been moved down a few places, e.g.
Fixed: ABCDEFGHIJKLMNOPQRSTUVWXYZ
Cipher: HIJKLMNOPQRSTUVWXYZABCDEFG
An example of an ‘encrypted’ message will be;
Encrypted message; PMSSV
Original message: Hello
Usage
Caesar cipher may be used when communicating with other people so only those who know where the alphabet is aligned to the fixed alphabet will know how to decrypt it for example: the army may use it during war time to make sure; if the enemy gets a hold of the encrypted message, they will not be able to determine what the message says immediately.