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Questions tagged [ecb]

ECB (Electronic Code Book) is a degenerate mode of operation for block ciphers.

Electronic Codebook mode (ECB) is a mode of operation for block ciphers that involves dividing the message into blocks and encrypting each block independently.

ECB mode encryption

It is the simplest mode of operation, but is considered very weak. Identical plaintext blocks are encrypted into identical ciphertext blocks, which makes it easy for an attacker to circumvent its security. As such, it is not recommended to be used for any secure system. Instead, a secure mode such as Cipher-Block Chaining (CBC) or Counter (CTR) mode should be chosen.

Why ECB is not secure?

ECB is not semantically secure because identical blocks of plaintext will be encrypted to the same ciphertext block. This vulnerability helps the attacker to find out plaintext patterns.

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PHP generate symmetric key with AES, ECB mode block and PKCS5Padding

I need to generate symmetrics keys with standard AES in ECB mode block and with PKCS5Padding, but I can't do it. During my searches, I only found functions to encrypt something with this conditions above. But I don't want this; I want to generate a…
Ricardo Martins
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Decrypt with QT AES/ECB/PKCS5Padding

Hy, I am developing an application for QT Mobile Symbian^3 devices. I need to decrypt a message encrypted using AES, ECB and PKCS5 padding. Below is the java code that decrypts the message: public static byte[] decrypt(byte[] raw, byte[] encrypted)…
Bogdan Şara
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Is It Ever Recommended To Use The ECB Cipher Mode?

Judging from this Wikipedia article on cipher modes and other things I've heard about ECB, it's a big no-no and can leak information about your encrypted data. However, there are still plenty of examples out there on the 'net that utilize ECB: One…
John B
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AES 128 ECB Decrypting in .net C#

For my new project I have to decrypt some files that have been previously encrypted by somebody else. The information I have so far, is : "The encryption is based on Advanced Encryption Standard (AES) Algorithm aes-128-ecb", the decryption key, 32…
Plasticgoat
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linux kernel crypto API for ECB AES

I am trying to write a sample code for using linux kernel crypto userspace interface. And I do found a example really helped me a lot, thanks to nibrunie: #include #include #include #include…
Wally
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Error while trying to encrypt using AES-128-ECB algorithm

I've been trying to encrypt some messages using "crypto" library in NodeJS, and I'm getting the following error: (node:31732) UnhandledPromiseRejectionWarning: Error: error:0607F08A:digital envelope routines:EVP_EncryptFinal_ex:data not multiple of…
0rka
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Decrypt String with OpenSSL Issue Output

I've got a Encrypted String, and I need to decrypt it: The information that I have: Encryption Used: RFC3826 (AES-128 ECB) Encrypted String: AjL4iV8YSGnNOCQYOJXIP97GjCAYp2k0QLm56XxJN0p/yu5xQh5uitX3UmfP3bzZaXDd2u6hMwp6cxO3cNL1cg== Key:…
Carlos Bilangieri
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Decrypting 3DES ECB with MD5 key on iOS

I am trying to decrypt data from a .NET server in an iOS application. The data has been encrypted with 3DES in ECB mode. I was able to successfully decrypt this same data on Android, but on IOS I just keep getting garbage output. I've compared…
ajh158
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NodeJS 3DES ECB encryption does not equal C# encryption

I'm trying to convert the C# code to encrypt text using 3DES ECB (You can copy and paste it on https://dotnetfiddle.net/ to run it) using System; using System.Configuration; using System.Security.Cryptography; using System.Text; public class…
sendy halim
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Encryption: TCB (Tweaked CodeBook) algorithm - what is it?

Can someone please provide a description of TCB algorithm?
Vladislav Rastrusny
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decrypting with DES throws an ”InvalidKeyException: Parameters missing” when using other mode than ECB

I basically use the code from here http://www.avajava.com/tutorials/lessons/how-do-i-encrypt-and-decrypt-files-using-des.html for an encryption app but I want to be able to chose the mode of operation so I added this: private String key; private…
Stoica Dan
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RSA Encryption in ECB Mode

I'm having issues with my code. What I am trying to do is encrypt a file using ECB Mode (meaning, encrypt blocks of text with no chaining into the next block). It works perfectly sometimes, but sometimes it does not. The issue comes when it encrypts…
Bobby Brown
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How to decrypt with as3crypto string encrypted with by aes-256-ecb?

String is encrypted with php as here. It can be decrypted by this with parameters: Rijndael-256, ECB and Base64. But it cannot be decrypted by my ActionScript code: var text:String = "Some data"; var key:ByteArray = new…
user1826684
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Random access encrypted file

I'm implementing a web based file storage service (C#). The files will be encrypted when stored on the server, but the challenge is how to implement the decryption functionality. The files can be of any size, from a few KB to several GB. The data…
Andreas
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AES ECB mode requires padding , how come we have this AES/ECB/NOPADDING then?

We are using the below cipher AES/ECB/NOPADDING But I am little confused because modes like ECB need the input to be padded according to the block size.But here we say NOPADDING.Dont they look contradictory. Can we have arbitrary data which is not…
crackerplace
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