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Introduction

Unit15 - Organisational System security Security policies Guideline updating of security procedures and scheduling of security audits Updating current measures of security e.g. anti-virus and firewall to keep protection at its highest. Making sure buildings and systems aren't being accessed by unauthorised people e.g. with the use of id cards and usernames with passwords. Also reviewing current measures of security in order to make sure the current system is reliable and finding ways to improve it. codes of conduct e.g. email usage Establishing the rules for using the email system within the organisation e.g. business related enquiries only, not for personal use, e.g. not opening attachments from unknown sources e.g. opening of .exe files. internet usage policy Internet should be used for only business related tasks. E.g. research. Nothing off topic e.g. social networking, games, restricting downloads etc. surveillance and monitoring policies Installing security devices such as CCTV, to protect the building and data e.g. by making sure employees don't damage equipment etc. risk management; Carrying out risk assessments and providing employees with updated health and safety guidelines. ...read more.

Middle

It is used in combination with activity logs to make it easier to see whose done what. ensuring compliance including disciplinary procedures We should make sure all employees are aware of the consequences of not sticking to the company policies. e.g. informing them of disciplinary steps if a serious breach of company policy is committed e.g. by using verbal warnings, written warnings and finally the sack . training and communicating with staff as to their responsibilities We should prepare training to teach current staff new skills in order to complete their jobs and update them on policy changes so they know how/if it may affect their role in the business. We should also communicate with our employees;to help them to understand their roles and responsibilities as well as improve morale and security. Task 2 Policy Description email usage policy This policy will help keep systems secure by disallowing employees to download files from unknown source and .exe files which will keep the systems secure by preventing viruses, keyloggers etc from getting on the system. ...read more.

Conclusion

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. ...read more.

This student written piece of work is one of many that can be found in our AS and A Level Information Systems and Communication section.