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Seguridad app web
- 1. Desarrollo de Aplicaciones Web Seguridad
- 21. Fin de la Unidad Gracias por su atención!!!
Notas del editor
- Firstly, I recommend you try encrypting and decrypting using the examples below to see if you get the same results. If your results bear no relation at all to the examples below check you are using the same mode , same algorithm (eg single or triple DES) and same input vector (for CBC mode). If only the last part of your result is wrong, check you are using the same padding method . Encrypted data might also become corrupted in transport (eg from the client to server) or when displayed on the screen (see first example below). For these reasons I convert the strings to and from hexidecimal. (Note that this conversion is not done automatically by the algorithm . You have to do it explicitly before or after running DES.) So also check that your package uses hexidecimal (and not base64 or some other method), check whether or not it needs the 0x at the beginning of the hexidecimal string, and check that the hexidecimal conversion works the same (for example "test string" should convert to 0x7465737420737472696e67).