|
|
|
|
|
|
|
Crypto Algorithm USA NSA
NSA Type 2 cryptographic algorithm
Skipjack is an encryption algorithm for the transmission of information
(voice data in particular),
developed by the National Security Agency (NSA) in the USA.
It uses the Diffie-Hellman key exchange algorithm for the
distribution of the cryptographic session keys between peers.
|
The Skipjack algorithm was classified as
an NSA Type 2 encryption product.
It was intended for voice data networks (telephone) and was initially
developed for the NSA's ill-fated
Clipper Chip project, shown in the image on the right
[1].
In 1994, (then) AT&T researcher Matt Blaze, found a serious weakness in
the Escrowed Encryption System (EES), which allowed a malicious party
to bypass the clipper chip's escrow capability [4].
The algorithm was initially
classified as SECRET, so that it could not be examined in the usual manner by
the encryption research community.
After much debate, the Skipjack algorithm was finally declassified and
published by the NSA
on 24 June 1998 [2]. It used an 80-bit key
and a symmetric cipher algorithm, similar to DES.
|
|
|
|
|
SKIPJACK-based products on this website
|
|
|
|
The SKIPJACK algorithm was implemented inthe following products [4]:
|
ECB Electronic Code Book CBC Cipher Block Chaining CFB Cipher Feed Back OFB Output Feed Back
|
|
|
|
Any links shown in red are currently unavailable.
If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Wednesday 12 February 2014. Last changed: Wednesday, 20 December 2023 - 15:24 CET.
|
 |
|
|
|
