how to generate barcode in c# Lesson 3: Encrypting and Decrypting Data in Visual C#

Making Quick Response Code in Visual C# Lesson 3: Encrypting and Decrypting Data

Lesson 3: Encrypting and Decrypting Data
QR Code Generator In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create Quick Response Code image in Visual Studio .NET applications.
www.OnBarcode.com
Decoding QR In Visual C#.NET
Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Asymmetric key encryption is a cryptographic technique for encrypting data using key pairs, in which one key performs the encryption, and the other key must be used to perform decryption. There are two asymmetric algorithm classes in the .NET Framework: RSACryptoServiceProvider and DSACryptoServiceProvider (used only for creating digital signatures). Hashes process a file and produce a unique key that can be used to validate the integrity of the file. If the file is modified in any way, the hash will also be changed. Therefore, hashing is useful when you want to ensure that a file has not been changed. Digital signatures enable you to use a public key to verify that a file is signed with a private key. In environments with a public key infrastructure, you can use digital signatures to verify that a specific user created a file.
Print Barcode In Visual C#
Using Barcode drawer for Visual Studio .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Read Barcode In C#
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Lesson Review
Printing QR Code In .NET
Using Barcode generator for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
www.OnBarcode.com
Printing QR Code ISO/IEC18004 In Visual Studio .NET
Using Barcode generator for .NET Control to generate, create QR Code image in VS .NET applications.
www.OnBarcode.com
You can use the following questions to test your knowledge of the information in Lesson 3, Encrypting and Decrypting Data. The questions are also available on the companion CD if you prefer to review them in electronic form.
Draw QR Code 2d Barcode In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create QR-Code image in VS .NET applications.
www.OnBarcode.com
1D Barcode Printer In Visual C#.NET
Using Barcode generation for Visual Studio .NET Control to generate, create Linear 1D Barcode image in .NET applications.
www.OnBarcode.com
NOTE Answers
Printing Barcode In Visual C#
Using Barcode drawer for .NET Control to generate, create bar code image in .NET framework applications.
www.OnBarcode.com
Matrix 2D Barcode Maker In Visual C#
Using Barcode creator for .NET Control to generate, create Matrix Barcode image in .NET framework applications.
www.OnBarcode.com
Answers to these questions and explanations of why each answer choice is right or wrong are located in the Answers section at the end of the book.
Creating Code39 In Visual C#.NET
Using Barcode creator for .NET Control to generate, create Code 39 image in Visual Studio .NET applications.
www.OnBarcode.com
Drawing Identcode In C#.NET
Using Barcode creator for .NET Control to generate, create Identcode image in Visual Studio .NET applications.
www.OnBarcode.com
1. Which of the following classes requires both the encryptor and decryptor to have the same key (Choose all that apply.) A. RSACryptoServiceProvider B. RijndaelManaged C. TripleDES D. DSACryptoServiceProvider E. DES F. RC2 2. Which of the following must be synchronized between the encryptor and decryptor when using symmetric encryption (Choose all that apply.) A. SymmetricAlgorithm.Key B. SymmetricAlgorithm.Salt
PDF 417 Reader In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Printing Data Matrix ECC200 In Objective-C
Using Barcode generation for iPad Control to generate, create Data Matrix 2d barcode image in iPad applications.
www.OnBarcode.com
12
Paint GTIN - 128 In Java
Using Barcode generation for Android Control to generate, create GS1 128 image in Android applications.
www.OnBarcode.com
QR Code 2d Barcode Creation In None
Using Barcode encoder for Font Control to generate, create QR Code JIS X 0510 image in Font applications.
www.OnBarcode.com
User and Data Security
Bar Code Encoder In Objective-C
Using Barcode drawer for iPad Control to generate, create barcode image in iPad applications.
www.OnBarcode.com
Paint GTIN - 13 In VS .NET
Using Barcode drawer for Reporting Service Control to generate, create EAN13 image in Reporting Service applications.
www.OnBarcode.com
C. SymmetricAlgorithm.IV D. SymmetricAlgorithm.Mode 3. Under which circumstances should you export the private key from an asymmetric encryption algorithm A. When transferring data across a network for a single session B. When a remote computer will be sending you a private file that you must be able to decrypt C. When you are encrypting a file that needs to be read later D. When you are sending a remote computer a private file that the remote computer must be able to decrypt 4. Which of the following are keyed hashing algorithms (Choose all that apply.) A. RIPEMD160 B. HMACSHA1 C. SHA512 D. MACTripleDES E. MD5
Creating Barcode In None
Using Barcode generator for Font Control to generate, create barcode image in Font applications.
www.OnBarcode.com
UPC Symbol Recognizer In Visual Basic .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
12 Review
Review
To further practice and reinforce the skills you learned in this chapter, you can perform the following tasks:
Review the chapter summary. Review the list of key terms introduced in this chapter. Complete the case scenarios. These scenarios set up real-world situations involving the topics of this chapter and ask you to create a solution. Complete the suggested practices. Take a practice test.
Summary
Use role-based security (RBS) to control which users can access which aspects of your application. You can base RBS on the local Windows user database, an Active Directory domain, or a custom user database.
Discretionary access control lists (DACLs) define which users can access which objects, whereas security access control lists (SACLs) define what logging is performed when users attempt to access a file. You can use classes in the System.Security.AccessControl namespace to view and manipulate both types of ACLs. The cryptography classes in the System.Security.Cryptography namespace enable you to encrypt and decrypt data (using either symmetric or asymmetric algorithms), validate data (using hashing), and sign data (using digital signatures).
Key Terms
Do you know what these key terms mean You can check your answers by looking up the terms in the glossary at the end of the book.
access control list (ACL) Advanced Encryption Standard (AES) asymmetric encryption authentication authorization
12 Review
cipher text Data Encryption Standard (DES) declarative RBS demands digital signature discretionary access control list (DACL) encryption key hash imperative RBS demands inherited permission initialization vector (IV) keyed hash algorithms MD5 principal policy RC2 Rijndael role-based security (RBS) security access control list (SACL) SHA1 shared secret symmetric encryption Triple DES
Copyright © OnBarcode.com . All rights reserved.