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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 attack on AES ECB

This is a school challenge. Given an encrypted file (which is an audio file) I need to figure out how I can decrypt it. Don't have a key, of course. Now the clue is that I have a small part of the original plain audio file, but I do not know from…
user11672881
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Convert C# TripleDES ECB decrypt/encrypt into PHP with openssl_encrypt/openssl_decrypt

I'm trying to recreate the following C# implementation of TripleDES ECB with PKCS7 padding in PHP using openssl_encrypt and openssl_decrypt. private static string Key = ""; public…
Sobo Ta
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Decoding a base64 text with AES-128-ECB (NO PADDING) with hash md5 as key

So I have a problem that I cant't seem to solve. I need to decode some Base64 text using a generated hash md5 as key. I have written this code. The output does not come out readable. The key's "freeforall" and "validate" are the actual ones. Can…
Vinícius Luis da Silva
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What are the best ways to attack a AES ECB encrypted file?

I received an interesting challenge today from my teacher(the problem can be solved). The only thing i have is a 1MB AES-encrypted file and i have to decrypt it and find some information within. I assume the mode used was ECB-128, because from what…
Țurcanu Ștefan
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DES encryption and cipher modes

I need to encrypt an ISO 8583 message... the problem here is that the message is longer than the key. I need some one help me how to encrypt this string. For example: I have 300 chars in my string; should I encrypt each 16 chars alone then concat…
habib
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JAVA AES ECB Encryption to Golang migration

I try to port a Java implementation of AES decryption to Golang. I need to decrypt data that is previously encrypted by the JAVA code using Golang. But so far I have no luck decrypting it. The Java code is: private static byte[] pad(final String…
jroehl
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Encrypt with PHP and Decrypt with Java

I have to write a program to decrypt a message using JAVA. The message is encrypted using Triple DES / ECB implemented in PHP. I have tried a few different settings on the algorithm, mode, and padding schema. I do not get the correct result. What is…
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Use openssl_encrypt to replace Mcrypt for 3DES-ECB encryption

I have an encryption method with mycrypt and the cipher is 3des, mode ecb: mcrypt_module_open ( MCRYPT_3DES, '', 'ecb', '' ) Now I want to encrypt it using openssl_encrypt, and I did not find des3-ecb in openssl_get_cipher_methods() list.
yiming.xie
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Java AES Decrypting problem

I have been tasked with decrypting a file in Java that has been encrypted using the following criteria: AES encryption algorithm with 128-bit key, ECB mode and PKCS7 padding. The encrypted file format is: - first byte is hex 0x31 – specifying…
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AES in ECB mode using WolfCrypt

I am using OpenSSL in a Desktop software and WolfCrypt (which is also open source) in its embedded counterpart. For this project I must use AES in ECB mode, even though I know ECB is not the most secure mode of operation for AES. According to this…
LordCapybara
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Produce the ECB penguin with AES in python

I want to encrypt data in an image but the resulting ciphertext to still be a valid image. I encrypt the image with AES in python and then, I replace header in the files, but windows can't open the encrypted image. Code def encrypt_file(self,…
davidad
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Javascript AES in ECB mode with Pkcs5 padding

Is it possible in javascript to use AES in ECB mode with the Pkcs5 padding scheme? The reason why i want to use the ECB mode is because it is desired by the client.
user1987623
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Cipher with AES/ECB128/PKCS5Padding keeps throwing "No such algorithm" exception

Does anyone know what's wrong with this code? Cipher cipher = Cipher.getInstance("AES/ECB128/PKCS5Padding", "SunJCE"); Algorithm: AES Mode of operation: ECB (with 128 appended to specify the block size) PaddingSchemce: PKCS5Padding This seems…
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TripleDES ECB Encryption in Perl that's compatible with PHP mcrypt's implementation

I'm trying to create a package in perl that is equivalent to our pre-existing class in php for handling data encryption. The encryption type seems to be TripleDES in ECB mode however I cannot replicated the resulting cypher text using Crypt::CBC or…
Damian
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Swift AES ECB decryption

I'm trying to decrypt a string in swift that was encrypted by a third party using AES ECB with a 256bit key and a 128bit initialization vector. This is my swift code: struct AES { private let key: Data private let iv: Data init?(key:…
Jannik
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