Questions tagged as 'criptografia'

Tagged questions
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Problem in condition to handle string

It was meant to work only with lowercase letters and when it came to symbols did not change, but they are being altered. What's the problem? #include <stdio.h> int main() { char texto[100]; int i = 0,j = 0,con,tam; printf("texto\n");...
asked by 18.10.2015 / 17:51
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Group Diffie-Hellman key exchange

How to make a hellie diffie key exchange with 10-20 people eg how?     
asked by 21.02.2015 / 17:04
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Problem with User Password Validation (php, mysql, crypt)

I'm just trying to validate the password typed with the password stored in the database, and the password stored in the database has been encrypted. The problem is that I type the correct password, my function searches for the correct registry i...
asked by 04.09.2015 / 17:48
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Obfuscate code in ActionScript 3.0 in SWF in Flash?

I found this program called Sothink SWF Decompiler that reverse-engineers .SWF by converting them to .FLA , leaving even the whole file schedule visible and open to the user. Is there any method of obfuscating the code within a .SWF so...
asked by 19.02.2014 / 17:13
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Bugs in algorithm that encrypts text

I am writing an algorithm that encrypts text using a password word, Vigenère cipher. Upper and lower case characters should be encrypted, special characters, and numbers should be ignored. My questions: When you run the program, enter the pa...
asked by 19.09.2017 / 01:02
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Doubts about Cesar's figure

The problem is that I need to stop printing when it reaches the last digit of the vector, but I do not know how to do it, and also how do I print after the z, because the way I did it, it did not print? (I'm a beginner so if you can explain how...
asked by 05.10.2016 / 19:32
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Sript PHP with secure connection on all pages

I developed a small system in PHP that makes the registration of resumes. I stayed at Hostgator. In the contracted plan, I am entitled to a free Private SSL, then I requested the installation of the same in my domain. Configure in the htaccess f...
asked by 13.07.2016 / 21:30
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Encrypt passwords as securely as possible

I'd like to know how to encrypt passwords on Android and what are the best practices. I'm using Eclipse, SQlite database to store the password locally and MySql with PHP to store on the server via HttpClient . My application will be of...
asked by 08.01.2016 / 18:18
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How to encrypt and decrypt data to be transmitted via sockets?

I have a program that logs in with my server, however the connection is without any protection. I looked for some ways to protect but it seems that some of them have a pass code, in the client, but I need to make the connection encrypted, and pr...
asked by 09.05.2015 / 20:08
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PHP crypt password

I have two curiosities about encryption of passes, I have this code: 1-     $ mainpass="test123"; $md5pass = md5($mainpass); $sha1pass = sha1($md5pass); $cryptpass = crypt($sha1pass, 'st'); echo ($cryptpass); Whose output is: 'stSuGIR46...
asked by 25.03.2014 / 11:38