Figure 9--Diffie-Hellman key exchange algorithm Connection to the application with a user name and password Selection of the receiver and die image to use for the exchange Prime number generation (P: Q: a) and calculation of A Binary transformation of the data to be transmitted Data insertion in the selected image by the LSB algorithm Watermark the image comer and send the image to theuser B Receiving the response from user B Yes No Verification if the image was not rotated B extraction and S calculation I Hash the S by the MD5 algorithm 128 bit key
generated A hash is done on the key S using the MD5 algorithm (Marakeby, 2013) which allows us to obtain a 128-bit key.
Hardware specification for computation: CPU: 2.6Ghz, i3 6th,Gen with 16 GB RAM Average Time Consumption (in milliseconds) Schemes 32 bit keywords 32 bit key
g function [w.sub.0] to words [w.sub.8] [w.sub.7] to [w.sub.5] 9 Original, AES 3.67 5.73 6.32 RK-AES 6.78 8.87 9.33 Table 3: Comparison of cost of attacks.
it a bit key
, his "But I hope my personality and relationship with Joe (means) we shouldn't have any problems.
The tool uses automatic on-the-fly encryption with AES 256 bit key
AES (128 bit key
length) operates in a counter mode with CBC-MAC (CCM).
The company has increased the strength of encryption of its cloud services, to 2048 bit key
length, which is considered not to be "readily breakable," Smith said.
This table includes speed measurements for common algorithms, such as AES with a 256 bit key
in output feedback mode (OFB) (see ), the RC4 stream cipher (see ), and the Salsa20 (see ) stream cipher and the HC128 stream cipher (see ), together with our proposal.
The cipher takes 128 bit key
and 128 bit initialization vector (IV).
Each uses a standard 128 bit key
. In the export version, this key is not reduced in length.
A 56 bit key
creates 72 quadrillion possible combinations.
In addition to those elements, the keyed rounds use 32 bit key
multiplication, data-dependent rotations, and key addition.
"Forty bit key
technology is adequate to stop someone from nicking US$50 off your bank account but not for protecting industrial secrets and medical records," says Whitfield Diffie, a widely respected expert on cryptography and an engineer at Sun Microsystems.