Top "Encryption" questions

Encryption is the process of transforming information (called plaintext) into an unreadable form (called ciphertext) using an encryption algorithm combined with a parameter (called an encryption key).

How to fix Invalid AES key length?

I am working on a text encryption and decryption project (following Struts 2) Whenever I enter the password and the plain …

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InvalidKeyException : Illegal Key Size - Java code throwing exception for encryption class - how to fix?

I've been trying to get some working Java code to use for encrypting Paypal buttons. This is no easy task! …

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How to Generate Unique Public and Private Key via RSA

I am building a custom shopping cart where CC numbers and Exp date will be stored in a database until …

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AES vs Blowfish for file encryption

I want to encrypt a binary file. My goal is that to prevent anyone to read the file who doesn't …

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How to encrypt and decrypt file in Android?

I want to encrypt file and store it in SD card. I want to decrypt that encrypted file and store …

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C# Example of AES256 encryption using System.Security.Cryptography.Aes

I need to implement AES 256 encryption /decryption and I haven't been able to find an example that works correctly. MSDN …

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How to resolve the "EVP_DecryptFInal_ex: bad decrypt" during file decryption

I have the following query.Could any one please suggest me a solution. I'm working on encryption and decryption of …

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Using SHA1 and RSA with java.security.Signature vs. MessageDigest and Cipher

I'm trying to understand what the Java java.security.Signature class does. If I compute an SHA1 message digest, and …

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How do I generate a SALT in Java for Salted-Hash?

I've been looking around and the closest answer is : How to generate a random alpha-numeric string? I want to follow …

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What is the meaning of ToString("X2")?

I'm studying MD5 encryption, and have found this code using Google: public string CalculateMD5Hash(string input) { // Primeiro passo, calcular …

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