Cryptography

Assignment : Cryptography

Question 1: 

Security professionals need to ensure that they keep up to date with the latest
threats and security issues. This allows them to update their risk profiles,
such as identifying if their systems are vulnerable. In order to determine what
the risk to an organisation is, you need to know what the problems could be.

In
this assignment, your task is to identify a recently announced security
vulnerability and write a profile of the threat. The profile should contain:

1.    Name
of the threat,

2.    Systems
it attacks,

3.    How
it performs its attack,

4.    Mitigation
strategies

5.   Discuss
on the scope of the threat in terms of who could be exploiting this
vulnerability (Cyber criminals or state nations)

6. Concluding
reflection (100 words) on the adequacy of the mitigation strategies.

Your
report should be maximum 2 pages and should contain relevant tables,
calculations, a ranked list of threats (in terms of impact) and conclusions.

See
the scoring sheet for this assignment, and ensure that your report fulfils the
criteria listed.

Question 2:

You
are required to learn the GPG/PGP package using Linux Kali
environment (learning the applications of private and public key cryptography
to secure email messages and documents) to be able to answer the following
questions. You should pair up with one of your class fellow to do this lab and
record results and give commentary on the results.

If
you do not have a class fellow then create two user accounts and you can
encrypt using one account and descript using other account. You should use screen shots from your experiments to
support your responses.

a)  Generate
keys of 2 different sizes for RSA encryption scheme and include these keys in
the report. Discuss why generation of different size of keys takes different
amount of time.

b)   Encrypt
a file (text or binary) using one
key and include your results and note the observation.

c)    Create
a file of close to 1 GB and encrypt and decrypt it using one key and note the time taken. Comment on the reason why this
much time has taken. Calculate how long it would take to do the
encryption/decryption of a 10 GBs of data.

d)  Export
your public key and discuss the reason why your exported key should be in ASCII
format.

e)    Encrypt
a file and output the cipher text in ASCII format.

f)     You
should work with your class fellow/or create two accounts to do this experiment
and record your observation in the form of commands being used or procedure
being followed and includeyour results.

      I.           Exchange your public
key and your friend’s public key using email.

   II.          Import your friend’s
public key into your key ring.

III.      Encrypt a file using
your friend’s public key and send the encrypted file to your friend.

IV.         Ask your friend to
decrypt the encrypted file.

  V.           You can ask your friend
to do the same thing.

g) Write
a reflection report in 100 words about the role cryptography is playing in
messaging apps to ensure privacy of individuals. Use an example of an app in
your reflection.

(Refer
to http://www.pa.msu.edu/reference/pgpdoc1.html
and

http://www.pa.msu.edu/reference/pgpdoc2.html,
or any document about PGP/GPG)

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