encryption

问题 As most of you know, email is very insecure. Even with a SSL-secured connection between the client and the server that sends an email, the message itself will be in plaintext while it hops around nodes across the Internet, leaving it vulnerable to eavesdropping. Another consideration is the sender might not want the message to be readable - even by the intended recipient - after some time or after it's been read once. There are a number of reasons for this; for example, the message might

问题 I want apply the RSA encryption to my project, but encountered some troubles: First, I have download the JavaScripts library from http://www.ohdave.com/rsa/ ,and add reference to my project; Second, I have define the RSA object and code to initialize that: internal RSACryptoServiceProvider Rsa { get { if (HttpContext.Cache["Rsa"] != null) { RSACryptoServiceProvider encryptKeys = (RSACryptoServiceProvider)HttpContext.Cache["Rsa"]; return encryptKeys; } else { return new

问题 So I have been browsing the internet, and came across the MySQL built-in function AES_ENCRYPT. It doesn't seem too hard to use, but some sources tell me to store the encrypted data as a VARCHAR, and some say to store it as a BLOB. What should I store the encrypted data as? 回答1: Many encryption and compression functions return strings for which the result might contain arbitrary byte values. If you want to store these results, use a column with a VARBINARY or BLOB binary string data type. This

问题 I'm working on an encryption channel to encrypt the communication between two devices. So I'm creating a helper class to do the encryption and decryption. I've googled a lot and found a piece of code that can parse RSA Public Key Into RSACryptoServiceProvider . This is the code: public static RSACryptoServiceProvider DecodeX509PublicKey(byte[] x509key) { byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 }; byte[] seq = new byte[15];

问题 Issue : ➜ I want to get information about my AMI to know if it is Encrypted or not and If yes, then with which key it is encrypted with (AWS Managed CMK or Customer Manager CMK) so that I can utilize this information while sharing my AMI with another account without any issues. 回答1: Solution :➜ ****We can get this information using AWS Console as well as AWS CLI which could be useful while troubleshooting Encrypted AMI/Snapshots and KMS co-relation**** How can I check using AWS CLI Commands:

问题 This thread should not be for discussion on how bad ECB mode is, and that I should change it, but that BouncyCastle doesn't really support the mode, except for in Java, where you can use "getInstance". The code I am using is this, and it only decrypts the first block(0x1000 bytes) correctly. BufferedBlockCipher Blowfish = new BufferedBlockCipher(new BlowfishEngine()); KeyParameter r3 = new KeyParameter(Blowfish_Key); Blowfish.Init(false, r3); Blowfish.ProcessBytes(pio.GetBuffer(), 0, (int)pio

问题 I want to make my PDF document protected by not allowing fill in and copy from it. I am using iTextSharp for this. I have following code: PdfReader reader = new PdfReader(document, System.Text.Encoding.UTF8.GetBytes(PASSWORD)); using (MemoryStream ms = new MemoryStream()) { using (PdfStamper stamper = new PdfStamper(reader, ms)) { stamper.SetEncryption( null, Encoding.ASCII.GetBytes(PASSWORD), PdfWriter.ALLOW_PRINTING, PdfWriter.ENCRYPTION_AES_128); } } reader.Close(); When the document is

问题 How do I configure OpenAM (with OpenDS behind it as the identity provider) to encrypt the SAML Response Assertion? The messages are working fine, but I want to encrypt the Assertions with a certificate I have placed into the OpenAM keystore.jks. I can't find anything in the documents. 回答1: SAML does not support ecryption of the whole Response and there shoudnt be any sensetive information in it besides in the assertion. The assertion or attributes is probably what you want to encrypt.

问题 I've problem with decryption data encrypted in cryptojs. Sometimes it works sometimes not, if works it returns "Message", but if dosent it returns garbage. var salt = CryptoJS.lib.WordArray.random(128/8); var key256Bits500Iterations = CryptoJS.PBKDF2("password", salt, { keySize: 256/32, iterations: 5 }); var iv = CryptoJS.enc.Hex.parse('1011121c1d1e1f'); var encrypted = CryptoJS.AES.encrypt("Message", key256Bits500Iterations, { iv: iv }); var data_base64 = encrypted.ciphertext.toString

问题 Here is my code so far. I need to run the encode part of the code 5 times and then decode the encode the same number of times. I figured out how to encode the message but now I can't figure out how to run the "encode" or "decode" variable back through the code to strengthen the ecryption. public class Codes { /** * Encode and decode a message using a key of values stored in * a queue. */ public static void main(String[] args) { int[] key = {7, 6, 5, 2, 8, 5, 8, 6, 4, 1}; Integer keyValue;