Jun 30th, 2016
Studypool Tutor
Price: $5 USD

Tutor description

The document contains short notes on operating systems security and brief explanations about what operating systems security is.

Word Count: 1186
Showing Page: 1/56
OPERATING SYSTEMSSECURITYSecurity9.1 The security environment9.2 Basics of cryptography9.3 User authentication9.4 Attacks from inside the system9.5 Attacks from outside the system9.6 Protection mechanisms9.7 Trusted systems1The Security EnvironmentThreatsSecurity goals and threats2IntrudersCommon Categories1. Casual prying by nontechnical users2. Snooping by insiders3. Determined attempt to make money4. Commercial or military espionage3Accidental Data LossCommon Causes1. Acts of God-fires, floods, wars2. Hardware or software errors-CPU malfunction, bad disk, program bugs3. Human errors-data entry, wrong tape mounted4Basics of CryptographyRelationship between the plaintext and the ciphertext5Secret-Key Cryptography Monoalphabetic substitution each letter replaced by different letter Given the encryption key, easy to find decryption key Secret-key crypto called symmetric-key crypto6Public-Key Cryptography All users pick a public key/private key pair publish the public key private key not published Public key is the encryption key private key is the decryption key7One-Way Functions Function such that given formula for f(x) easy to evaluate y = f(x) But given y computationally infeasible to find x8Digital Signatures(b) Computing a signature block What the receiver gets9User AuthenticationBasic Principles. Authentication must identify:

Review from student

Studypool Student
" Only issue was the guy's response time which was a bit long, which made me a bit anxious. Reached out to the help desk and they helped me out, turns out the tutors aren't all from US which meant there was a time difference. No issues on the quality. "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1820 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors