business expiration needs

ExpirationFoundations of Information Security Series

Vicente Aceituno @vaceituno

(c)Inovement Europe 2014

Vicente Aceituno

vac@zenobia.es - Skype: vaceituno

Linkedin - linkedin.com/in/vaceitunoInovement Europe - inovement.esVideo Blog - youtube.com/user/vaceitunoBlog - ism3.comTwitter - twitter.com/vaceitunoPresentations - slideshare.net/vaceituno/presentationsArticles - slideshare.net/vaceituno/documents

Foundations of Information Security Series

Needs

Secrecy Intellectual Property you Own

Intellectual Property you Use

Privacy

Availability

Retention

Expiration

Quality

Obligations

Technical

Compliance

Legal

What is Information Security?

“Information Security” is an emergent property of people using information.

People have expectations about information.

If there is no people or no information, “Information Security” is meaningless, as there are no expectations to meet.

What is Information Security?

When expectations about information are met, there is “Security”.

When expectations about information are not met, there is an “Incident”.

What is Information Security?

Some expectations are things people (or organizations) want to happen for their own reasons. These are Needs.

Some expectations are things people (or organizations) want to happen in order to meet technical, legal or standard compliance requirements. These are Obligations.

Expiration

Expiration

Some expectations of people about informationare related to ownership, control and use of information over time.

Expiration

Ownership is defined having legal rights and duties on something.

Control is defined as having the ability to: Grant or deny access to users.

Attribute to specific users their use of information.

Use is defined as having access to read, writeor modify information.

Expiration

There is an expectation that information will be controlled by their owners or authorized administrators only, for as long as they are authorized.

There is an expectation that information will be used by authorized users only, for as long as they are authorized.

Expiration

If these expectations are met or not is independent of the observer and repeatable.

Expiration expectations can be determined answering the following question: Under what circumstances should the information be destroyed?

(Example: Information system sent to the dealer for maintenance)

When should the information be destroyed? When does this length of time start counting?

Answering these question renders requirements that can managed.

Expiration related incidents

When information can be controlled or used after the expected length of time.

For a more complete list of incidents check tiny.cc/incidents

Achieving Expiration

In order to achieve Expiration, normally informationis overwritten with random information.

The directly related O-ISM3 process is: OSP-6: IT Managed Domain Clearing

Having multiple copies of information makes it less likely that Expiration expectations are met.

Expiration

The O-ISM3 Challenge

This was an exercise designed to throw into sharp relief the inadequacy of traditional information security concepts.

Check the exercise in full at tiny.cc/indepth

A summary of conclusions from the exercise, in relation to Expiration, follow.

Secrecy

Business Needs

Intellectual

Property

Privacy

IntegrityBusiness

Obligations

Integrity

Availability

RetentionQuality

Exp

iratio

n

Integrity

ISO Definition: The property of safeguarding the accuracy and completeness of assets.

ITIL Definition: A security principle that ensures data and Configuration Items are only modified by authorized personnel and Activities. Integrity considers all possible causes of modification, including software and hardware Failure, environmental Events, and human intervention.

CobIT Definition: Relates to the accuracy and completeness of information as well as to its validity in accordance with business values and expectations.

Expiration and Integrity

Integrity can’t be measured (it doesn’t have units). Therefore is not independent of the observer nor repeatable like Expiration is.

Expiration can be used to measure, communicate and manage a specific expectation of people about information.

Integrity is not necessary to understand or measure Expiration.

Expiration and Integrity

Expiration and Integrity are not equivalent.

Integrity and Expiration are not synonymous.

Integrity is not useful to understand Expiration.

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