encryption

问题 I've been rather busy trying to get a secure exchange established between a browserclient, using the webcrypto api and PHP server using openssl. I've broken down things as much as I can. I wrote some javascript to generate a keypair, print out the values private and public, encrypt a simple string and print it out as well. I've copied the values straight to a simple php script. Trying to decode it with the values from the javascipt. Encoding and decoding works properly in the javascript (as

问题 I want to encrypt video on the fly that android camera captures. So I need to tell android MediaRecorder to write it video stream to my CipherOutputStream . The problem is MediaRecorder.setOutputFile() method accepts only FileDescriptor and there is no way to get encrypting file descriptor from CipherOutputStream. So my question is how can I either emulate FileDescriptor to receive data writes and do encryption manually or somehow convince MediaRecorder to stream video into CipherOutputStream

问题 I'm having some issues with my code whereby I am not using the same IV for encryption and decryption. I know in order to do this correctly I have to write the IV to my output file before the data however I am struggling implementing this. Could anyone help me with this issue? Edited code code again to show full scope public class TestFileEncryption { private static void mainCrypto(int cipherMode, File inputFile, File outputFile) throws Exception{ //Let the user enter the key they wish to use

问题 I'm currently developing an android application but i'm expecting some issues due to storage and retrieving of a SecretKey into the Keystore This is my code: Here I generate the SecretKey and then save it into KeyStore, and use it to encrypt my data try { KeyStore keyStore=null; keyStore= KeyStore.getInstance(KeyStore.getDefaultType()); char[] passwordKS="network".toCharArray(); SecureRandom sr = SecureRandom.getInstance("SHA1PRNG"); sr.setSeed("any data used as random seed".getBytes());

问题 I'm trying to implement the javax.crypto encryption between my apps (through intnets). I follow this (accepted answer): https://stackoverflow.com/questions/4319496/how-to-encrypt-and-decrypt-data-in-java .The problem is as I understood I need to have the same SecretKeySpec key in both of my apps in order to encrypt/decrypt the data. I have no idea how to export it (as a String or anything) and then hardcode it in both of my apps. 回答1: You can export a SecretKey using the getEncoded() method.

问题 I am writing a Spring mvc app and it needs to send an email with a link and encrypted params. The user will click on the link and I need to decrypt the params in the new page. So I am writing a util class to encrypt and decrypt along with encoding and decoding the parameters. When I run my stand alone java class(using for testing) - I get the following error when the decryption is called(encrypting, encoding, decoding works fine). java.security.InvalidAlgorithmParameterException: Wrong IV

问题 I am trying to read an RSA private key into .Net using BouncyCastle to test data I have previously encrypted. The encrypted data is working fine using the public key and Bouncy Castle and I have also used the same private key as below (which is DER format) to successfully decrypt my data in a PHP application but I don't know why I can't create the private key in .Net to do the same thing: byte[] privatekey = File.ReadAllBytes(@"C:\Users\Luke\privkey.der"); var rsaKeyParameters =

问题 I know there are lots lots of articles available about hashing and encryption algorithm. I have figure it out from them that use hashing function instead of encryption to store password in the database . So I decided to use SHA-256 algorithm to generate hash key and I am storing that hash key into my server database instead of plain password. Now I am really not able to understand how I should use it, because each time I am passing the same password to generate SHA key it gives me different

问题 I want to send emails with a Python script by using Python's smtplib. The script should only send the email, if an encrypted connection to the server can be established. To encrypt the connection to port 587 I want to use STARTTLS. Using some examples I have written the following code: smtp_server = smtplib.SMTP(host, port=port) context = ssl.create_default_context() smtp_server.starttls(context) smtp_server.login(user, password) smtp_server.send_message(msg) msg, host, port, user, password

问题 I want to store a Json string in a text file in encrypted form and then read that json string from that file. 来源： https://stackoverflow.com/questions/66228086/how-to-encrypt-and-decrypt-the-json-string