Cryptography

question about the OFB mode of operation
DES_init() DES_set_key('aaaaaaaa'); DES_set_iv('bbbbbbbb'); DES_set_mode('ofb'); ciphertext = DES_encrypt("\0\0\0\0\0\0\0\0") DES_init() DES_set_key('aaaaaaaa') DES_set_mode('ecb') plaintext = DES_decrypt(ciphertext) Correct me if I'm wrong, but shouldn't an ECB decryption of an OFB encrypted string of nu... 26 Feb 2010 16:27

English Version of Julien Havet
Is there an English version available of Julien Havet's work from the late 19th century? Thanks. Russell Weisfield --- news://freenews.netfront.net/ - complaints: news(a)netfront.net --- ... 25 Feb 2010 10:16

Fractionalization and Playfair
In classical crypto there are the so-called fractional substitution ciphers. A typical example is the German ADFGX, where a 5*5 matrix containing a randomly ordered 25 letter alphabet (normally manually obtained with a key and transposition) is read out with a column vector at the left and a row vector above the ma... 2 Mar 2010 00:16

"Data Validation" - Website Upload.
This an upload to my website http://www.scalarcryptography.co.uk that may be of interest to some readers - adacrypt. ... 25 Feb 2010 05:51

ISO/IEC 18033-3 request
Hi! For my research work I need draft or something full of ISO/IEC 18033-3. Does anybody here have this standart? ... 24 Feb 2010 13:08

A pattern found in first 25 million Prime Number sums - using the golden ratio log!
A pattern found in first 25 million Prime Number sums - using the golden ratio log Lp! ----------Assume Prime Numbers are Three Dimensional ABST: Prime Number sums reveal a 3D pattern - using the golden ratio log! ----------Introduction It is well known that Prime Number attributes are logarithmic a... 24 Feb 2010 12:00

Salt
Comparing these 2 things 1) Hashing a X byte Salt & Y Byte Password or 2) Hashing a (X + Y) Byte Password. Will 1 be more secure than 2? If yes, I am not able to understand the reason? Can someone help? Basically, in many cases, I am not able to figure out how a salt helps? Relative newbie to crytog... 25 Feb 2010 01:29

Status of cryptography mailing list at Metzdowd?
Anyone on this newsgroup know the status of the cryptography mailing list at metzdowd.com? Mail archives show last post there on 11/25 or so. Their web server host (green.metzdowd.com) is up as I can ping it, but the web server is refusing connections. I've sent queries to the list owner as per initial instructio... 25 Feb 2010 11:25

Subj: A 3D pattern found in Prime Number sums - using the golden ratio log! - Updated
On Feb 22, 7:58 pm, Gerry Myerson <ge...(a)maths.mq.edi.ai.i2u4email> wrote: In article <phntn55ccfbjkvmittig7d4g206j1q1...(a)4ax.com>,  rom...(a)sbcglobal.net wrote:    Assume Prime Numbers are Three Dimensional If you really want to set off alarm bells that scream CRANK POST COMING!!!!! then the ... 22 Feb 2010 22:03

Question about polymorphic encryption used by some company
I came across this product, called "encrypt stick", they claim to use something I never heard of, called polymorphic encryption. Anyone could advise if this products sounds like a snake oil? I am copying below their technical explanation: From: https://www.encrypt-stick.com/our-technology The ENC Polym... 22 Feb 2010 11:51