Collaborate Disseminate
I want to develop a symmetric crypto system but with one difference. The generating of seeds should be sychronized. In result for example two sender/receiver units should get the same seed so a communication between them is p… Continue reading Generating seed and key indepent
I want to develop a symmetric crypto system but with one difference. The generating of seeds should be sychronized. In result for example two sender/receiver units should get the same seed so a communication between them is p… Continue reading Generating seed and key indepent
I’m currently developing an authentication service for our company. I somehow understand how to store a salt used in hashing a password in that it should be stored together with the hashed password. That means for every accou… Continue reading How to store an AES Key? an Initialization Vector(IV)?
I’m currently developing an authentication service for our company. I somehow understand how to store a salt used in hashing a password in that it should be stored together with the hashed password. That means for every accou… Continue reading How to store an AES Key? an Initialization Vector(IV)?
I’m looking at the crypto library examples (programmed in c) provided for OpenSSL EVP on OpenSSL Wiki.
Their example for a 128 bit Initialization Vector is as follows:
/* A 128 bit IV */
unsigned char *iv = (unsigned cha… Continue reading OpenSSL EVP aes_256_cbc Initialization Vector Size
I want to improve the encryption flow used by my application.
Today I use the AES cipher while its key and its IvBuffer are hardcoded in the code.
I know it is not secured and I want to improve this.
I want to create a new AE… Continue reading Is it secured to store the encrypted key in the database (encrypted by other cipher)?
One of the major weaknesses of WEP is a short 24-bit IV, which means that only 224 packets are needed to exhaust all IVs. 224 translates to about 16.5 million IVs (or packets for that matter).
Although we need this many pack… Continue reading Regarding number of packets needed to crack WEP
According to Wikipedia, the initialization vector (IV) does not have to be secret, when using the CBC mode of operation. Here is the schema of CBC encryption (also from Wikipedia):
What if I encrypt a plaintext file, where… Continue reading Why does IV not need to be secret in AES CBC encryption?
I want to encrypt data using AES in java, and I want to intialize the cipher with Initialisation Vector.
Can I use 256-bits IV ? Or I must use only 128-bits IV ?
Continue reading Encrypting using AES-256, can I use 256 bits IV?
I am an a-level student writing an encryption program using an rc4 implementation I have written myself. I have the basic algorithm coded correctly (and I have checked that some ciphertext for a given key and plaintext matche… Continue reading For use with RC4 how do I combine a reused key and an initialization vector