md5

Check update#1 This logic is a candidate for a authentication procedure, done by simple HTTP requests: I'm sending: userName + encrypted_userName (encrypted_userName is actually the encrypted result of userName, done using AES & as key i use the md5 hash of the password). NOTE: I'm not sending the md5 hashed Password. on the server I'm comparing: encrypted_userName with own_encrypted_userName (since on server i have access to full info on user, i calculate own encrypted_userName). Question : is this a security flaw? Say bad guy captures full HTTP request, can he extract password from this 2

Can anyone, please, explain to me how to transform a phrase like "I want to buy some milk" into MD5? I read Wikipedia article on MD5, but the explanation given there is beyond my comprehension: "MD5 processes a variable-length message into a fixed-length output of 128 bits. The input message is broken up into chunks of 512-bit blocks (sixteen 32-bit little endian integers)" "sixteen 32-bit little endian integers" is already hard for me. I checked the Wiki article on little endians and didn't understand a bit. However, the examples of some phrases and their MD5 hashes in that Wiki article are

i dont even expect this problem, but it appears. I try to get md5 hash from string in swift. I search about that on SO and assume that i need to import library like that: #import <CommonCrypto/CommonCrypto.h> First of all compiler said that '#' is not okay. Then i removed and compiler said that '<' is not okay. I tried to figure out that and find recommendations to add folder named "CommonCrypto" and create a file named "module.map". I cant understand how to create file with this extension. Okay, i create swift file and replace its extension. Then write code there: module CommonCrypto [system]

I was wondering to hash the password in PHP using different methods available and the combination of them for more and more security. I was wondering if this would work..? $pass = "***"; $salt = "!@)#%%@(#&@_!R151"; $pass = sha1($pass.$salt); $pass = md5($pass); Rather than that, you can use a stronger hashing algorithm like sha512 with combination of a strong salt and UserID : Do it like this: echo hash('sha512', 'MyPassword' . $StrongSalt . $UserID); SHA512 is actually SHA-2 for which there are no collisions found. See at wikipedia . Nope. Combinations do not add any security. Actually you

I can't make MessageDigest work, the program gives me two error: UnsupportedEncodingException, NoSuchAlgorithmException byte[] bytesOfchat_key = "lol".getBytes("UTF-8"); MessageDigest md = MessageDigest.getInstance("MD5"); byte[] Digest = md.digest(bytesOfchat_key); If I throw the errors, it give me ﾜ￟ﾴ9ￇﾇnp>0xd￉z as response ( 16 chars ) PS: I have used to print the Digest for (byte b : Digest) { System.out.print((char)b); } md5 returns hexadecimal numbers, so for decoding it to a String you could use String plaintext = "lol"; MessageDigest m = MessageDigest.getInstance("MD5"); m.reset(); m

I'm creating a program that checks files by comparing their MD5s to a DB of already checked MD5s. It loops through thousands of files, and I see that it uses a lot of memory. How can I make my code as efficient as possible? for (File f : directory.listFiles()) { String MD5; //Check if the Imagefile instance is an image. If so, check if it's already in the pMap. if (Utils.isImage(f)) { MD5 = Utils.toMD5(f); if (!SyncFolderMapImpl.MD5Map.containsKey(MD5)) { System.out.println("Adding " + f.getName() + " to DB"); add(new PhotoDTO(f.getPath(), MD5, albumName)); } } And this is toMD5: public static

I can't see any way to salt a MD5.ComputeHash(Stream). Am I missing some way of injecting bytes into the HashAlgorithm? I tried performing a ComputeHash(byte[]) before performing the stream compute, but, unsurprisingly, it had no effect. Any ideas (apart from modifying the file)? Thanks for your time. addendum Just to be a little more specific, I want to use a stream to get a hash on a large file that I don't want to load into memory. FileInfo myFI= new FileInfo("bigfile.dat"); FileStream myIFS = piFile.OpenRead(); MD5 md5 = MD5.Create(); byte[] hash = md5.ComputeHash ( myIFS ); myIFS.Close ()