Skipjack algorithm

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Skipjack algorithm

A symmetric cryptographic algorithm developed by the U.S. National Security Agency (NSA). It is used in the Department of Commerce's Escrowed Encryption Standard (EES), which was embodied in the CLIPPER chip.

The key to the encrypted message is itself encrypted with a key combined from two escrowed keys. The encrypted key and an identifier of the chip that sent it is encrypted again with a "family key." In this way, a law enforcement agency can use the family key to decrypt the outer layer and glean the chip ID, which is used to obtain the two escrowed keys that are combined to decrypt the key that decrypts the message. Skipjack uses an 80-bit key to encrypt 64-bit blocks, but algorithm details are classified. See CLIPPER chip.
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References in classic literature ?
“Sairtainlee!” exclaimed the complaisant Frenchman, “it ees ver fine,”
oui; ees, sair,” returned Monsieur Le Quoi, with a slight shrug of his shoulder, and a trifling grimace, “dere is more.
“It ees ver apropos of saircumstance,” said the French-.
"Have you heerd nought?" "Ees," says I, "I heerd street-door shut, no time at a' ago.
"Ees, I seen 'em sure enough," says Willum, grasping a prong he carried, and preparing for action.
'I have been hauling overflow loads for EES since 2011, and I am extremely excited to have Graham Trucking within the EES family of companies,' stated Ray Graham.
The wide distribution of this word and completely regular sound correspondences make the hypothesis of its borrowing from Baltic (Koivulehto 1983; SSA 1 : 462; EES 213) quite improbable.
Upon the merger, Patriot shareholders will hold approximately 5.7% of the total outstanding EES common stock before earnouts.
Leon Joyce, EES CEO, said closing terms changed in the merger consideration from the letter of intent.
In a related development, the EES and GAF will in the coming days announce the Eagle Extra Stout Armwrestling Challenge which would see the sport promoted in selected cities across the country.
The post EES, 3i Infotech to provide advanced digital technology solutions appeared first on TahawulTech.com.
As a part of this partnership, EES has been officially been appointed as a tier-one partner and will leverage Lenovo's industry-leading data centre portfolio to drive intelligent transformation through software defined solutions for enterprise customers in the UAE.