Questions tagged as 'criptografia'

Tagged questions
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Problem in "encrypting" text program in Java

So guys, I have a little problem with one of the workouts I have to do. The teacher provided .doc with instructions for a " Encryptor Program " that should mask the alphabet and encrypt a text (Enigma style). See Exercise Statement:...
asked by 05.10.2015 / 09:35
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How to encrypt images with algorithm RC5 in Java

I'm trying to use the RC5 algorithm with the Java cipher class, but it's returning an error, can anyone help me? import java.io.*; import java.security.*; import javax.crypto.*; public class EncriptaDecriptaRC5 { KeyGenerator keyGenerato...
asked by 24.09.2015 / 15:34
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Best way to use AES encryption

Well, let's say I'm working on a system where the encryption key is derived from the user's password (something like what KeePass does), in that case I have three questions: Which algorithm to use to derive the key? So that it is as far as po...
asked by 30.09.2017 / 16:51
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Code to generate the user password hash in Oracle 10G with C #?

I need to authenticate users in a WEB application in the Oracle 10g database, but the credentials are native to the database for running an Oracle Forms application, and we would like to keep the same password on both systems (Single Sign-On )....
asked by 05.12.2017 / 04:58
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Encrypt XML with TJMG public key

I need to encrypt this XML <?xml version="1.0" encoding="utf-8"?><Selos> <CodigoServentia>0000000099</CodigoServentia><Selo><CodigoSequencialUnico>ABC00005</CodigoSequencialUnico><CodigoDeSeguran...
asked by 05.05.2015 / 00:30
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Choose encryption in SSL

How can I define exactly which encryption I will use in the routine below? I want to define for example that the encryption to be used is AES, or DES, or 3DES ... // Setup truststore KeyStore trustStore = null; trustStore = KeyStore.getInstanc...
asked by 13.10.2014 / 04:46
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Self-Signed Certificate Security

I'm doing a Java Client-Server system that will manage computers in a room, the scenario is as follows: A computer, the server, waits for connections, when an action is taken (Screen Lock) this command is then sent to all connected clients....
asked by 10.11.2017 / 01:30
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Help with code (seems to be hexadecimal)

Hello, in my course had a joke, anyone who could decipher the code would win a prize, I tried in hexadecimal, but I did not get anything. 51 44 52 20 59 44 20 57 44 52 20 4a 48 51 57 4c 4f 50 48 51 57 48 20 51 48 56 56 44 20 45 52 44 20 51 52...
asked by 22.10.2016 / 01:33
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What differs an FPGA for a CPU?

I was looking at some publications about the cryptographic algorithm BLAKE, which was one of the finalists of the SHA-3 competition, whose winner was Keccak . Finally, in the specific section of the book "The Hash Function BLAKE", at the begi...
asked by 12.06.2017 / 20:38
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Should I encrypt the password on the application or server?

I'm making an application that requires user registration and my question is whether to do the encryption in the application and save it to the server or send the password and do the encryption on the server at the time of the registry?     
asked by 24.08.2017 / 16:27