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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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Crypto-js: how to use aes ecb mode with 256bit

my code: function AesDecrypt(word, keyIn) { let decrypt = CryptoJS.AES.decrypt(word, keyIn, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 }); return decrypt.toString(CryptoJS.enc.Utf8); } function AesEncrypt(word, keyIn) { …
light
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How to encrypt/decrypt in flutter using ECB mode/AES256 without having IV?

I am trying to encrypt string in flutter/Dart. I have tried the below code but looks like having IV is mandatory. final key = Key.fromBase64("Some_Key"); final iv = IV.fromBase64("Some_Key"); // I do not need IV for encryption/decryption final…
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Why AES is not decrypting my encrypted text?

does ecb mode have bugs? why my program not working even I did everything... I am stuck please help. Text I encrypted : hello world My attempt : from Crypto.Cipher import AES import base64 key = '0123456789abcdef' #this is the password that we are…
Ratnapal Shende2
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C# Decrypt 3DES method to Swift language

I have a code in C# and I actually convert it on iOS Swift. I have this function in C#: public static string DecryptString(string Message) { byte[] Results; System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding(); …
Florent Marchais
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Implementing AES/ECB/PKCS5 padding in Python

I am trying to implement a python program to encrypt a plain text using AES/ECB/PKCS5 padding. The output I am getting is slightly different from expected. Python3 program: import base64 from Crypto.Cipher import AES def add_to_16(value): …
NaniK
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PHP openssl_decrypt doesn't get same results as online tools

Using an online encrypt/decrypt tool, using DES-ECB, I can encrypt an 8 digit hexadecimal number using an 8 digit hexadecimal key, resulting in an 8 digit hex result. I can decrypt that 8 digit result by the same key and get the original data I…
Jeremy Caris
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How to get context information in Javascript from the Sharepoint ECB menu items - CAMOpt

I want to hide specific menu items in the ECB of a sharepoint list, in function of the item the ECB is opend for. I overloaded the CAMOpt function to hide some context menus for all listitems. That works , but now I want to hide some context menus…
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Node API Request using AES-ECB Encryption : Fail (The header content contains invalid characters)

fairly noobish at aes-ecb encryption, apologies in advance. I am trying to make an API call to a server that requires a encrypted payload. I'm having a little trouble in the sequence in which i encrypt my data converting between base64 and…
ShurShoora
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Java: Which mode is by default set in Javax Cipher class?

I am working on securing a chat application written in Java (it is downloaded from the internet, and now I want to secure it in order to learn). I have read the documentation, but I am unable to figure out which mode of encryption is set by default,…
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Encryption AES 128

I've been asked at work to implement a request for a simple web service with the following instructions: AES encryption: Type: ECB Size: 128bits Padding Mode: PKCS7 key: 9b6018215942b2e1da3797d3394779bf In the docs (just a given example) they say…
Hula Hula
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Entity - control - boundary patterns

I have been trying to draw some UML diagrams for simple scenarios and I am new to this. Does use case realization model refer to the same as ECB entity-control-boundary pattern?
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How to efficiently multithread an algorithm?

I'm going straight to the point. I have this code: while (inputLength > 0) { if (mode == MODE_AES_ENCRYPT) aesni_ecb_encrypt(ctx, input + shift, 16, output + shift); else if (mode == MODE_AES_DECRYPT) aesni_ecb_decrypt(ctx,…
Tom Clabault
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How can I add IV (initialization vector) to AES-256 ECB Encryption to create AES-256 CBC mode?

I have the following code working for AES-256 ECB encryption using a simple byte-oriented AES-256 library I found here. Main: #define DUMP(s, i, buf, sz) {printf(s); \ for (i = 0; i < (sz);i++) \ printf("%02x ", buf[i]); \ printf("\n");} int main…
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Crypto++ aes-256-ecb result is different with openssl

I'm trying to encrypt a simple string such as "Hello World!" via Crypto++, and decrypt it via Crypto++ succeed. but I got an error when decrypt Crypto++ encrypted result via OpenSSL command. My C++ code: #include #include #include…
lidroid
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the result of ECB Encryption is maybe different. it is same as the result of CBC

public class Symmetric1 { /** * @param args the command line arguments */ public static void main(String[] args) throws Exception{ // TODO code application logic here KeyGenerator kg =…
ByungWuun
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