Questions tagged as 'criptografia'

Tagged questions
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Friedman test _

I have a question. I read that friedman's test was something like this: Friedman's test tries to find out the period of the cipher by calculating several values of Κ (C, C ^ n) n, where C ^ n represents the ciphertext with n shifts on the lef...
asked by 03.01.2016 / 16:59
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Symmetric cryptography swift

I am new to swift, and would like to encrypt a string, using some symmetric encryption algorithm so that it is possible with the same decrypt key. I would like to know how this can be done in the Swift language.     
asked by 17.01.2016 / 16:40
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Can you encrypt the embedded version of Firebird?

I intend to use the embedded version of Firebird on my application server. Is there any way to encrypt and use this database as in SQLite?     
asked by 28.04.2015 / 00:32
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Encrypting a String for RC2 in JavaScript

Is there a way to use RC2 encryption through some JavaScript function? I'm making a mobile application where its validation token needs to be through this encryption because the rest of the system already uses it. EDITED Through a com...
asked by 29.04.2015 / 13:39
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Login password encryption [duplicate]

I need to create a way to encrypt my login password on my system, as I have not yet implemented this security and I have no idea how to do this. So how could I create this encryption and compare it to the login time and see if it's right? T...
asked by 11.02.2015 / 01:40
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How to decide which cryptographic hash to use? [duplicate]

I would like to know in which cases I should use the various hashes, as far as I know there are large differences between security and processing between them. Are there any considered the best in relation to speed x security?     
asked by 06.02.2015 / 18:10
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RSACryptoServiceProvider, SSLStream (OpenSSL) - Encrypt, Decrypt

After server authentication from the certificate generated with openssl. sslStream.AuthenticateAsClient(serverName); Home The encryption of the data by the client is done as follows: string messsage = "teste123.<EOF>";...
asked by 23.06.2014 / 15:00
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Encrypt / Decrypt MYSQL / PHP autoincrement ID

I need to encrypt / decrypt the original MySQL ID printed on the HTML, then revert to the original ID on the backend. Ex: $var = $arr['id']; // 120 <table> <tr> <td>Logradouro tal e tal, 123</td> <td>...
asked by 31.01.2018 / 00:31
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Replacement of specific words

I want to create a code in PHP in which the user type, for example, "pedro went to the market" he replaced in a few words already registered type to exchange the syllable "mer" for copper and the syllable "went" for example. and give the text re...
asked by 12.02.2018 / 16:29
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Generate PrivateKey with library java.security

I want to generate a private key in the java standard for the PrivateKey format using RSA, but always in the invalid format. I have already tried several keys with openssl, generating by java and I can not find a solution. Follow the code to cre...
asked by 26.12.2018 / 01:09