引述 :『HashClash』

引述 :『Users can register at such a site and start solving challenges. There exist lots of different challenge types. The most common ones are the following: Cryptographic, Crackit, Steganography, Programming, Logic and Math/Science. The difficulty of these challenges vary as well. 』

引述 :『Hide In Picture is a program that allows you to conceal files inside bitmap pictures, using a password. The pictures look like normal images, so people will not suspect there is hidden data in them.』

引述 :『UDC is a program designed for auditing of the authorization systems, which also provides methods for secure passwords storing. 』

引述 :『The .NET framework contains a number of cryptography services that allow you to incorporate security services into your .NET applications. These libraries are located under the System.Security.Cryptography namespace and provide various functions such as encryption and decryption of data, as well as other operations such as hashing and random-number generation. In this article, I will show you how to use some of the common security APIs to make your .NET applications more secure.』

引述 :『Paj's Home: Cryptography: JavaScript MD5』