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    15 Aspects of Security

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    abcd abcd
    Computer security aims to protect confidentiality, integrity, and availability. Confidentiality ensures only authorized users can access information. Integrity ensures information cannot be altered without authorization. Availability ensures resources are accessible when needed. Other security topics like cryptography, firewalls, and passwords provide mechanisms to safeguard confidentiality, integrity or availability. The most important aspect depends on the specific context and data being protected.

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    15 Aspects of Security

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    abcd abcd
    37 views9 pages
    Computer security aims to protect confidentiality, integrity, and availability. Confidentiality ensures only authorized users can access information. Integrity ensures information cannot be altered without authorization. Availability ensures resources are accessible when needed. Other security topics like cryptography, firewalls, and passwords provide mechanisms to safeguard confidentiality, integrity or availability. The most important aspect depends on the specific context and data being protected.

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    Computer security aims to protect confidentiality, integrity, and availability. Confidentiality ensures only authorized users can access information. Integrity ensures information cannot be altered without authorization. Availability ensures resources are accessible when needed. Other security topics like cryptography, firewalls, and passwords provide mechanisms to safeguard confidentiality, integrity or availability. The most important aspect depends on the specific context and data being protected.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    37 views9 pages

    15 Aspects of Security

    Uploaded by

    abcd abcd
    Computer security aims to protect confidentiality, integrity, and availability. Confidentiality ensures only authorized users can access information. Integrity ensures information cannot be altered without authorization. Availability ensures resources are accessible when needed. Other security topics like cryptography, firewalls, and passwords provide mechanisms to safeguard confidentiality, integrity or availability. The most important aspect depends on the specific context and data being protected.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 9

    Aspects of Security

    Aspects of Security
    Aspects of Security

    Often, computer security is defined to encompass:


    Confidentiality: (Disclosure Threat)
    (also called secrecy/privacy) who can read information?

    Integrity: (Alteration Threat)


    Who can write, modify or generate information?

    Availability: (Denial of Service)


    Are resources available when needed?

    CIA Traid or Triangle

    Aspects of Security
    What About ...?

    Many other topics relate to computer Security


    Cryptography,
    Digital signatures,
    Access control, Firewalls,
    Passwords,
    Certificates,
    Many others.

    These are mechanisms for protecting one or more


    of the major aspects such as confidentiality or
    integrity.

    Aspects of Security
    Which Is Most Important?

    Question: Of confidentiality, integrity, and availability, which is


    the most important?

    Answer: It all depends on the context.

    • For a DoD system protecting the national war plan,


    confidentiality may be paramount.
    • For a bank protecting financial data, integrity may count most.
    • For an online retailer, availability may be a matter of survival.

    Aspects of Security
    What is Confidentiality About?

    How do I protect my information from unauthorized


    disclosure?
    Historically, this was the first computer security concern, and
    remains extremely important in military and commercial settings.
    Is all of my data equally sensitive? If not, how do I group and
    categorize data?
    How do I characterize who is authorized to see what? How are the
    permissions administered and checked?
    According to what rules?
    Can authorizations change over time?

    Aspects of Security
    What is Integrity About?

    How do I protect my information from unauthorized


    modification?
    Integrity is a fuzzier notion than confidentiality and more context
    dependent. But for many commercial applications it is more
    important than confidentiality.
    Who is authorized to modify my data? How do I separate and
    protect assets?
    Can I detect and/or correct erroneous or unauthorized changes to
    data?
    Can authorizations change over time?

    Aspects of Security
    What is Availability About?

    How do I ensure that my information/system resources are


    available when I need them?
    Threats to availability are often called denial of service (DoS)
    attacks.
    Are resources provided in a timely fashion?
    Are resources allocated fairly by the system?
    Is the system so difficult/tedius to use as to be useless?
    If faults occur, can the system compensate/recover?
    How is concurrency controlled by the system?
    Many virus and worm attacks are DoS attacks. The MyDoom
    worm cost businesses an estimated $38.5 billion, according to
    some estimates.
    Aspects of Security
    Lessons

    Much of computer security is about protecting confidentiality,


    integrity and availability.
    Authentication and non-repudiation may also be important in
    many contexts.
    Which of these is most important is highly dependent on the
    context.
    Many other topics in security involve mechanisms for
    protecting one of the “big three” (or five).

    Aspects of Security

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