encryption

问题 I want to discuss about openssl write and read method. Assume I have an data structure like below: /-----------------------------------------------------\ | my_header | PAYLOAD | \-----------------------------------------------------/ | | \ / \ / not encrypted encrypted I think the proper algorithm would be like this : SEND: build my_header with my own header. encrypt PAYLOAD with encryption function attach my_header and PAYLOAD (encrypted) to one buffer send it using common POSIX function

问题 I want to discuss about openssl write and read method. Assume I have an data structure like below: /-----------------------------------------------------\ | my_header | PAYLOAD | \-----------------------------------------------------/ | | \ / \ / not encrypted encrypted I think the proper algorithm would be like this : SEND: build my_header with my own header. encrypt PAYLOAD with encryption function attach my_header and PAYLOAD (encrypted) to one buffer send it using common POSIX function

问题 Is there a way to decrypt PBKDF2 password in java. Java has implementation of PBKDF2 algorithm as PBKDF2WithHmacSHA1 . I got the code to create hashes for password. I referred to below link for hashing technique: http://howtodoinjava.com/security/how-to-generate-secure-password-hash-md5-sha-pbkdf2-bcrypt-examples/ My requirement is to store the third Party FTP server password in the encrypted format and get back the password in plain text form from DB when there is a need to login into the

问题 I have a problem when I try to verify the ECDSA signature in Bouncy Castle in C#. The code is adopted from Java example that I have, so I am 100% sure that the public key and signature are correct. But the C# implementation always returns that the signature is not valid. I checked the curve parameters and they are correct. I tried with DER and "raw" signature and again it did not work. Can anybody spot what I am doing wrong: namespace TestECDSA { class Program { static void Main(string[] args

问题 I have been researching how to use Laravel Encryption as building a homestead encryption platform is frowned upon and rightfully so. Illuminate\Support\Facades\Crypt::encryptString('This is a secret message from user 1 to user 2'); Take the above example, this is using my APP_KEY which derives from my .env file, generation previously by php artisan key:generate . The issue is that user 1 is never issued two sets of keys to communicate only to user 2. User 3, 4 and so on could still read this

问题 I am creating an APP and need to encript only the content of an image. I need that the file was still an image after conversion, but the image showed does not show as the original. For example, I will send the image encrypted to other user and this one will be able to show and image (but not the original), but the original image was encrypted in that file. With the following algorythm I encrypted the entire file, and this cannot be opened as image due the header is encrypted as well. I am

问题 I've got a question about how Rails handles cookie encryption/decryption. I've got this in my config/environment.rb config.action_controller.session = { :session_key => [some key], :secret => [some secret] } And this in config/environment/production.rb et al.: ActionController::Base.session_options[:session_domain] = [some domain] So far, so good -- as long as all my Rails apps have the same session_key and secret, and are on the same domain, they can all use that same cookie. However, a

问题 I am really struggling with this, I need to encrypt and decrypt a string using BouncyCastle in C#. I really did try to do this on my own. I did manage to create my own keys (private and public). Please keep in mind that I am fresh out of college. 回答1: It took me a while to find a decent example of using bouncy castle for PGP. This is what I use in production. I'm pretty sure it originated from here. using System; using System.IO; using Org.BouncyCastle.Bcpg; using Org.BouncyCastle.Bcpg

问题 My query string is $SQLstring = "SELECT name, address, city, state, zip, homephone, cellphone, position, shift, status, workedherebefore, previousemploymentdate, referred, empname, under18, friends, empname2, currentlyemployed, contactemployer, lawful, worktime, workweekends, dateavailable, desiredsalary, position1, from1, to1, duties1, company1, cophone1, startsalary, endsalary, reasonleaving1, supervisor1, contact1, position2, from2, to2, duties2, company2, cophone2, startsalary2,

问题 I'm new with this encryption and decryption techniques. I'm working on a task with Clickbank Instant Notification system. I'm getting the encrypted values from Clickbank and I want to decrypt the notification. My problem is very similar to this thread but it is not working for me. It is throwing following error: Specified initialization vector (IV) does not match the block size for this algorithm. Below is my code for decryption. protected void Page_Load(object sender, EventArgs e) { //Sample