Collaborate Disseminate
I have written a message and encrypted it using cipher block chaining.
What will happen if the receiver loses the Initialization Vector, or doesn’t receive at all?
Continue reading Losing the Initialization Vector in Cipher Block Chaining
While we know that in the best practice in any AES communication is to not use a constant or all zero IV.
However, when I capture my authentication progress between my STA and AP. I found out that the EAPOL message of 1, 2 a… Continue reading WPA2 IV all zero in EAPOL message of 1,2 and 4
Wikipedia describes the following about IV reuse for stream cipher: For OFB and CTR, reusing an IV completely destroys security. This can be seen because both modes effectively create a bitstream that is XORed with the plaint… Continue reading Reuse of IV for AES CTR stream cipher
I’m writing a little program that stores passwords in Python. I access to the DB with Mysqldb module.
I want to encrypt the password with AES 256 with CBC. I’m trying to do this with SQL AES_ENCRYPT function.
I set the cbc m… Continue reading AES CBC with mysql and Python [migrated]
I’m supposed to write a script that will get the plaintext of a message which is firstly coded in base64, then URL coded (encoded ciphertext in AES-256-CBC). Padding is used as well such that the encoded message is a multiple… Continue reading Problem using padding oracle attack on this base64 – url coded message (AES CBC 256)
I just installed Linux (Ubuntu) for the first time and downloaded package OpenSSL as well. Opened command line as well and tried some commands but none of them worked.
So what I have is initial vector: 5a04ec902686fb05a6b7a3… Continue reading How can I encrypt / decrypt AES-256 CBC with OpenSSL?
Say you have the secret message encrypted with AES-256 in CBC mode
5a04ec902686fb05a6b7a338b6e07760 14c4e6965fc2ed2cd358754494aceffa
where the first 16 Byte is the initial vector, the second 16 Byte is the ciphertext. The … Continue reading How can you change the plaintext of the given secret message which is in AES-256 CBC
Assuming the following structure of a fixed size plaintext message:
16 bytes random nonce
1 byte data length
1 – 32 bytes payload data
1 byte data length
1 – 32 bytes payload data
1 byte payload data
padding to make whole m… Continue reading AES CBC with 0 IV, but random first plaintext block [on hold]
I’m encrypting some file with AES-256-CBC, and I’m planning to store the cipher text in a json file, with something like:
{
“data”: “0123456789ABCDEF…”,
“salt”: “00123ABCAABBCCDD…”,
“iv”: “000111ABCCBBCCDDFD…. Continue reading Should I store my encrypted password’s salt and initialization vector as clear text?
I have a PHP function I have written that uses a 64 bit binary string and a random initialization vector to encode data using the following basic principal:
$encrypted = openssl_encrypt($data_to_encrypt, AES_256_CTR, $64bit_… Continue reading Is it safe to include the IV at the end of a hash?