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Analytic Grids, the PivotCharts and PivotTables can report against many different data sources, including relational tables, cubes, XML, and more PivotCharts can even be created from data entered manually at the time the chart is created Unlike PivotCharts, PivotTables only have one active button, Commands and Options, when first created The Commands and Options button here is basically a conglomeration of the Commands and Options and Chart Wizard options from PivotCharts This one button opens a dialog box that lets users connect to a data source as well as change some properties of the grid Once a data source is chosen, the designer can choose to either select a single table or cube, or to write a query that returns the desired records After creating a connection for a PivotChart, a Chart Field List appears that shows all of the measures and all of the attribute hierarchies In keeping with the previous examples, a connection to the Adventure Works cube in Analysis Services would provide a list like that shown in Figure 6-22

The simplest implementations of passwords and personal identification numbers (PINs) yield the simplest of all authentication mechanisms Cathy s memorized password serves as the authenticator, verifier, and base secret The verification procedure simply performs a character string comparison of the authenticator (the password provided by Cathy) and verifier (a copy of the password stored in the mail server) In practice, password-based systems incorporate various cryptographic techniques to resist attacks, notably password hashing (Wilkes 1968) Passwords work reliably only as long as they are not guessed or otherwise disclosed to potential adversaries through accident, subversion, or intentional sharing If Cathy chooses her favorite color as a password, an acquaintance might guess it and try to log on as her Since she chose a common word as a password, it s also possible that Henry or some other attacker might use a dictionary attack to discover her password in a file of hashed passwords If Cathy logs in to her mail server across the Internet, Henry might be able to intercept her password while in transit, and then use it himself Although there are technical procedures to reduce the risks of guessing, accident, or subversion, there is no way to prevent Cathy or any other user from sharing passwords Some enterprises enact strict security policies that prohibit such sharing, but such sharing often occurs anyway Within the rank and file of an organization, coworkers will often share passwords if computer access is necessary for getting a job done but computer accounts aren t easy to establish If Cathy is an administrative assistant, it s quite possible that she ll share her password with a temporary assistant who s called in to replace her if she s sick; the alternative is to create an account for the temp, and many people aren t likely to bother with that hassle And if Cathy is like most people, she may have multiple accounts To simplify life, she may decide to use the same password,.

Downstream signals containing modulated carriers with digitally encoded manufacturing instructions make up the forward signal Messages are sent from the headend to the manufacturing machines and offices Upstream signals on modulated RF carriers contain data, requests for materials, and schedule progress These are sent through the headend to other offices and warehouses