Instructions: Answer all questions in a single document. Then submit to the appr
ID: 3805623 • Letter: I
Question
Instructions: Answer all questions in a single document. Then submit to the appropriate assignment folder. Each response to a single essay question should be about a half-page in length (about 150 words).
1. Cryptographic algorithms provide the underlying tools to most security protocols used in today’s infrastructures. The choice of which type of algorithm depends on the goal that you are trying to accomplish, such as encryption or data integrity. These algorithms fall into two main categories: symmetric key and asymmetric key cryptography. In this essay, please discuss the strengths and weaknesses of symmetric key cryptography and give an example of where this type of cryptography is used. Then discuss the strengths and weaknesses of asymmetric key cryptography and give an example of where this type of cryptography is used.
2. Cryptography has been used in one form or another for over 4000 years and attacks on cryptography have been occurring since its inception. The type of people attempting to break the code could be malicious in their intent or could just be trying to identify weaknesses in the security so that improvements can be made. In your essay response, define cryptanalysis and describe some of the common cryptanalytic techniques used in attacks. '
3. Many people overlook the importance of physical security when addressing security concerns of the organization. Complex cryptography methods, stringent access control lists, and vigilant intrusion detection/prevention software will be rendered useless if an attacker gains physical access to your data center. Site and facility security planning is equally important to the technical controls that you implement when minimizing the access a criminal will have to your assets. In your essay response, define CPTED and describe how following the CPTED discipline can provide a more aesthetic alternative to classic target hardening approaches. Make sure that the three CPTED strategies are covered in your response.
And Please provide Citations in APA format
Explanation / Answer
Symmetric key cryptography strengths and weaknesses.
Strengths: 1.Quick 2.Easy to implement 3.Hard to decode when large keys are used 4.Algorithms are freely available.
Weaknesses:1.Limited security does not provide authentication 2.Same key is used to encrypt and decrypt. 3.Problem of key transportation
example:Symmetric cryptography is generally used to secure electronic communication over internet.
Asymmetric Cryptography Strengths and weaknesses:
Strengths:1.No key distribution problem 2.Increased security 3.Can provide digital signatures
Weaknesses:1.Speed is less.2.Expensive interms of processing
Example:Digital Signatures are based on asymmetric cryptography to identify and authenticate an electronic document.
2.cryptanalysis is the sudy of ciher texts,crypto systems to identify the weaknesses in the system leading to the retrieval of plaintext with out the use of key.
The common cryptanalytic techniques used in attacks are
1.ciphertext only attack:encrypted message is available for attack
2.Known plain text attack
3.chosen plain text attack
4.chosen cipher text attack
5.man- in -the middle attacks:attacking communication lines
6.side party attacks:attacking implementation details like power timing etc
7.Brute force attack:trying all possible keys
8.Birthday attack:trying hashing functions
3.CPTED:Crime prevention through environment Design.
1.Natural survellience decreases the risk of unwanted actions by providing a view or visibility to general public.
by designing parking spaces and other landscaped to provide visibility limiting the security attacks.
2.Natural access control clearly mentioning the public space and private space indicating the entry points and exit points.
Using single entry points,Locking gates in front and back yards,Keeping Roof High etc.
3.Natural teritorrial Reinforcement by restricting private activities to private areas.making the normal user safe and making the attacker aware of risk making it more difficult to plan a crime.Motion sensor lights alerting active and absence of a presence etc