Amazon option trading for beginners to pros pdf
As computers and other digital devices have become essential to business and commerce, they have also increasingly become a target for attacks. In order for a company or an individual to use a computing device with confidence, they must first be assured that the device is not compromised in any way and that all communications will be secure. In this chapter, we will review the fundamental concepts of information systems security and discuss some of the measures that can be taken to mitigate security threats.
We will begin with an overview focusing on how organizations can stay secure. Several different measures that a company can take to improve security will be discussed. We will then follow up by reviewing security precautions that individuals can take in order to secure their personal computing environment. When protecting information, we want to be able to restrict access to those who are allowed to see it; everyone else should be disallowed from learning anything about its contents.
This is the essence of confidentiality. For example, federal law requires amazon option trading for beginners to pros pdf universities restrict access to private student information.
The university must be sure that only those who are authorized have access to view the grade records. Integrity is the assurance that the information being accessed has not been altered and truly represents what is intended. Just as a person with integrity means what he or she says and can be trusted to consistently represent the truth, information integrity means information truly represents its intended meaning.
Information can lose its integrity through malicious intent, such as when someone who is not authorized makes a change to intentionally misrepresent something. Integrity can also be lost unintentionally, such as when a computer power surge corrupts a file or someone authorized to make a change accidentally deletes a file or enters incorrect information. Information availability is the third part of the CIA triad. Availability means that information can be accessed and modified by anyone authorized to do so in an appropriate timeframe.
Depending on the type of information, appropriate timeframe can mean amazon option trading for beginners to pros pdf things. For example, a stock trader needs information to be available immediately, while a sales person may be happy to get sales numbers for the day in a report the next morning. Companies such as Amazon. Other companies may not suffer if their web servers are down for a few minutes once in a while. In order to ensure the confidentiality, integrity, and availability of information, organizations can choose from a variety of tools.
Each of these tools can be utilized as part of an overall information-security policy, which will be discussed in the next section. The most common way to identify someone is through their physical appearance, but amazon option trading for beginners to pros pdf do we identify someone sitting behind a computer screen or at the ATM? Tools for authentication are used to ensure that the person accessing the information is, indeed, who they present themselves to be.
Authentication can be accomplished by identifying someone through one or more of three factors: For amazon option trading for beginners to pros pdf, the most common form of authentication today is the user ID and password. In this case, the authentication is done by confirming something that the user knows their ID and password. But this form of authentication is easy to compromise see sidebar and stronger forms of authentication are sometimes needed. Identifying someone only by something they have, such as a key or a card, can also be problematic.
When that identifying token is lost or stolen, the identity can be easily stolen. The final factor, something you are, is much harder to compromise. This factor identifies a user through the use of a physical characteristic, such as an eye-scan or fingerprint. Identifying someone through their physical characteristics is called biometrics. A more amazon option trading for beginners to pros pdf way to authenticate a user is to do multi-factor authentication.
By combining two or more of the factors listed above, it becomes much more difficult for someone to misrepresent themselves. The RSA device is something you have, and will generate a new access code every sixty seconds. To log in to an information resource using the RSA device, you combine something you know, a four-digit PIN, with the code generated by the device. Once a user has been authenticated, the next step is to ensure that they can only access the information resources that are appropriate.
This is done through the use of access control. Several different access control models exist. Here we will amazon option trading for beginners to pros pdf two: For each information resource that an organization wishes to manage, a list of users who have the ability to take specific actions can be created.
This is an access control list, or ACL. For each user, specific capabilities are assigned, such as readwritedeleteor add. Only users with those capabilities are allowed to perform those functions. If a user is not on the list, they have no ability to even know that the information resource exists.
ACLs are simple to understand and maintain. However, they have several drawbacks. The primary drawback is that each information resource is managed separately, so if a security administrator wanted to add or remove a user to a large set of information resources, it would be quite difficult.
And as the number of users and resources increase, ACLs become harder to maintain. This has amazon option trading for beginners to pros pdf to an improved method of access control, called role-based access control, or RBAC.
With RBAC, instead of giving specific users access rights to an information resource, users are assigned to roles and then those roles are assigned the access. This allows the administrators to manage users and roles separately, simplifying administration and, by extension, improving security. Many times, an organization needs to transmit information over the Internet or transfer it on external media such as a CD or flash drive.
In these cases, even with proper authentication and access control, it is possible for an unauthorized person to get access to the data. Encryption is a process of encoding data upon its transmission or storage so that only authorized individuals can read it.
In order for this to work, the sender and receiver need to agree on the method of encoding so that both parties can communicate properly. This is called symmetric key encryption. This type of encryption is problematic because the key is available in two different places. An alternative to symmetric key encryption is amazon option trading for beginners to pros pdf key encryption.
In public key encryption, two keys are used: To send an encrypted message, you obtain the public key, encode the message, and send it. The recipient then uses the private key to decode it.
The public key can be given to anyone who wishes to send the recipient a message. Each user simply needs one private key and one public key in order to secure messages. The private key is necessary in order to decrypt something sent with the public key. It turns out that this single-factor authentication is extremely easy to compromise. Good password policies must be put in place in order to ensure that passwords cannot be compromised. Below are some of the more common policies that organizations should put in place.
Another essential tool for information security is a comprehensive backup plan for the entire organization. Not only should the data on the corporate servers be backed up, but individual computers used throughout the organization should also be backed up. A good backup plan should consist of several components. Besides these considerations, organizations should also examine their operations to determine what effect downtime would have amazon option trading for beginners to pros pdf their business.
If their information technology were to be unavailable for any sustained period of time, how would it impact the business? As information has become amazon option trading for beginners to pros pdf strategic asset, a whole industry has sprung up around the technologies necessary for implementing a proper backup strategy. Technologies such as storage area networks and archival systems are now used by most large businesses. Another method that an organization should use to increase security on its network is a firewall.
A firewall can exist as hardware or software or both. A hardware firewall is a device that is connected to the network and filters the packets based on a set of rules. A software firewall runs on the operating system and intercepts packets as they arrive to a computer. A amazon option trading for beginners to pros pdf may also be configured to restrict the flow of packets leaving the organization.
This may be done to eliminate the possibility of employees watching YouTube videos or using Facebook from a company computer. Some organizations may choose to implement multiple firewalls as part of their network security configuration, creating one or more sections of their network that are partially secured.
This segment of the network is referred to as a DMZ, borrowing the term demilitarized zone from the military, and it is where an organization may place resources that need broader access but still need to be secured. Another device that can be placed on the network for security purposes is an intrusion detection system, or IDS.
An IDS does not add any additional security; instead, it provides the functionality to identify if the network is being attacked. An IDS can be configured to watch for specific types of activities and then alert security amazon option trading for beginners to pros pdf if that activity occurs. An IDS also can log various types of traffic on the network for analysis later. An IDS is an essential part of any good security setup.
Using firewalls and other security technologies, organizations can effectively protect many of their information resources by making them invisible to the outside world. But what if an employee working from home requires access to some of these resources? What if a consultant is hired who needs to do work on the internal corporate network from a remote location?
In these cases, a virtual private network VPN is called for. A VPN allows a user who is outside of a corporate network to amazon option trading for beginners to pros pdf a detour around the firewall and access the internal network from the outside.
Through a combination of software and security measures, this lets an organization allow limited access to its networks while at the same time ensuring overall security. An organization can implement the best authentication scheme in the world, develop the best access control, and install firewalls and intrusion prevention, but its security cannot be complete without implementation of physical security. Physical security is the protection of the actual hardware and networking components that store and transmit information resources.
These measures include the following. Besides the technical controls listed above, organizations also need to implement security policies as a form of administrative control.
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