Results for "Author: robin schuil"

This project demonstrates steganography. Steganography is a method to hide something in something else. In this case we hide a text message in a picture. The need for steganography will probably increase the next few years, because governments want to restrict cryptography. Steganography allows you to send your secrets in a picture, making it less suspicious. It is very hard (impossible?) to detect if there is a message hidden in a picture using this method, because the locations where the bits are stored are determined by a password. Without this password you cannot tell where the bits are stored. Please vote for this code if you like it!

This project demonstates how to prevent keystroke recording for your application. Actually it would be a keystroke recorder jammer, because it sends out a continuous stream of random keystrokes and validates these against the internal streambuffer.

This project demonstrates you how to build an alert box like MSN Messenger has. It is displayed in the bottom-right corner of your screen. When an alert is shown while another one is still visible, it is placed on top of the existing box. By moving the mousecursor over the text it appears as a hyperlink. And to get a little bit of the Microsoft feeling I've added a simple gradient found elsewhere on PSC.

(Because of an error at PSC i had to re-upload this article :-S) This method can be used to authenticate users by letting them entering their email address and password. This method is highly secure due to its use of the MD5 algorithm to send the password encrypted. Provided security is better then the basic authentication featured in most browsers, and can be used in combination with HTTPS.

This demonstration program shows you a simple, but effective method to prevent users from capturing your picture box. When a user captures the screen, an entirely different image appears in your picture box. I am working on an ActiveX component version of this application. It will retreive the picture from a secret internet location, and display it to the user in Internet Explorer. This way, websites can protect their images from copying and capturing. (Just like TerraServer.com had in the beginning.) Please vote for this submission to support the development of this open-source tool.

The SpeedString class boost performance on string concatenation. Almost every VB developer uses strValue = strValue & NewData as concatenation. The SpeedString class does the same, but a few hunderds times faster (something up to 1000 times). This project demonstrates the use of my SpeedString class and compares the execution times of both methods.

I see simple XOR encryptions being posted on PSC very often. Many people don't know, but XOR is far from secure. Since the password is repeated many times in the encrypted message, it is easy to find out what password was used. This project demonstrates how to get the password from an encrypted message. It works on most encrypted messages, as long as the ciphertext is long enough. Please keep in mind that this project is ment as a demonstration, and not a full-blown cracker app. However, it can be used to crack many files and applications...

This project demonstrates steganography. Steganography is a method to hide something in something else. In this case we hide a text message in a picture. The need for steganography will probably increase the next few years, because governments want to restrict cryptography. Steganography allows you to send your secrets in a picture, making it less suspicious. It is very hard (impossible?) to detect if there is a message hidden in a picture using this method, because the locations where the bits are stored are determined by a password. Without this password you cannot tell where the bits are stored. Please vote for this code if you like it!

This project demonstates how to prevent keystroke recording for your application. Actually it would be a keystroke recorder jammer, because it sends out a continuous stream of random keystrokes and validates these against the internal streambuffer.

This project demonstrates you how to build an alert box like MSN Messenger has. It is displayed in the bottom-right corner of your screen. When an alert is shown while another one is still visible, it is placed on top of the existing box. By moving the mousecursor over the text it appears as a hyperlink. And to get a little bit of the Microsoft feeling I've added a simple gradient found elsewhere on PSC.

(Because of an error at PSC i had to re-upload this article :-S) This method can be used to authenticate users by letting them entering their email address and password. This method is highly secure due to its use of the MD5 algorithm to send the password encrypted. Provided security is better then the basic authentication featured in most browsers, and can be used in combination with HTTPS.

This demonstration program shows you a simple, but effective method to prevent users from capturing your picture box. When a user captures the screen, an entirely different image appears in your picture box. I am working on an ActiveX component version of this application. It will retreive the picture from a secret internet location, and display it to the user in Internet Explorer. This way, websites can protect their images from copying and capturing. (Just like TerraServer.com had in the beginning.) Please vote for this submission to support the development of this open-source tool.

The SpeedString class boost performance on string concatenation. Almost every VB developer uses strValue = strValue & NewData as concatenation. The SpeedString class does the same, but a few hunderds times faster (something up to 1000 times). This project demonstrates the use of my SpeedString class and compares the execution times of both methods.

I see simple XOR encryptions being posted on PSC very often. Many people don't know, but XOR is far from secure. Since the password is repeated many times in the encrypted message, it is easy to find out what password was used. This project demonstrates how to get the password from an encrypted message. It works on most encrypted messages, as long as the ciphertext is long enough. Please keep in mind that this project is ment as a demonstration, and not a full-blown cracker app. However, it can be used to crack many files and applications...

This project demonstrates steganography. Steganography is a method to hide something in something else. In this case we hide a text message in a picture. The need for steganography will probably increase the next few years, because governments want to restrict cryptography. Steganography allows you to send your secrets in a picture, making it less suspicious. It is very hard (impossible?) to detect if there is a message hidden in a picture using this method, because the locations where the bits are stored are determined by a password. Without this password you cannot tell where the bits are stored. Please vote for this code if you like it!

This project demonstates how to prevent keystroke recording for your application. Actually it would be a keystroke recorder jammer, because it sends out a continuous stream of random keystrokes and validates these against the internal streambuffer.

This project demonstrates you how to build an alert box like MSN Messenger has. It is displayed in the bottom-right corner of your screen. When an alert is shown while another one is still visible, it is placed on top of the existing box. By moving the mousecursor over the text it appears as a hyperlink. And to get a little bit of the Microsoft feeling I've added a simple gradient found elsewhere on PSC.

(Because of an error at PSC i had to re-upload this article :-S) This method can be used to authenticate users by letting them entering their email address and password. This method is highly secure due to its use of the MD5 algorithm to send the password encrypted. Provided security is better then the basic authentication featured in most browsers, and can be used in combination with HTTPS.