asp.net qr code reader

asp.net qr code reader

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When your app receives the message, it can add the same secret key and then run that same algorithm and compare the calculated result to the received hash. If the two are the same, it can be reasonably sure that the message is authentic.

Customers... Robert Stevens's email is: rstevens@mymail.com Julia Kerns's email is: julia.kerns@abc.com Nancy Whitrock's email is: nrock@myworld.com

Once you have defined a policy, you can create a scan and select your targets. There are multiple options for defining a target (see Figure 17 5). These options can give security auditors a more granular approach to scanning. You can scan a single host, and range of IP addresses, a subnet with CIDR notation, or a fully-qualified domain name. You can also import a text file containing a list of hosts defined in the same fashion.

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A trivial checksum might first convert every letter to a numeric value, as in our examples before, and then add the values together It will then divide the sum by 26 and take the remainder (for a value between 0 and 25) plus 1 (for a value between 1 and 26) This final letter is then appended to the end of the string prior to submission Suppose we want to send the message hello and our secret key is j So, the message helloj is transformed to 8 + 5 + 12 + 12 + 15 + 10, which equals 62 Dividing by 26 yields a remainder of 10, so the hash value is 11, or k We transmit the value hellok, keeping the secret key out of the message.

In Listing 3-4, we create three customers, add them to the object context, then call SaveChanges() to save these new customers to the database. After we have these customers in the database, we use two different approaches to retrieve them using Entity SQL. In the first approach, we use the CreateQuery() method on the object context to create an ObjectQuery. When we iterate over the customers, the query is executed in the database and the resulting collection is printed to the console. Because each element in the collection is an instance of our Customer entity type, we can use the properties of the Customer entity type. In the second approach, we use EntityClient in a pattern that is very similar to how we would use SqlClient or any of the other client providers in ADO.NET. We start by creating a connection to the database. With the connection in hand, we create a command object and open the connection. Next we initialize the command object with the text of the Entity SQL statement we want to execute. We execute the command using ExecuteReader() and obtain an EntityDataReader, which is a type of the familiar DbDataReader. We iterate over the resulting collection using the Read() method.

Once you have selected the appropriate plug-ins and options, it is time to scan your systems. Give your scan a name, and click Launch Scan. Once the scan is finished, you can click the Report tab to view the vulnerabilities available for your system (see Figure 17 6). Clicking on a scanned host will show you the open ports and running services. Clicking on a service will show you more details about the vulnerability as well as possible exploits.

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