USS Skipjack (SSN-585) provided support vessel services for another submarine's sea trials. Following this mission, "Skipjack" entered NNSDDCO in October for decommissioning. "Skipjack" was decommissioned and stricken from the Naval Vessel Register on 19 April 1990, having served for 31 years in the US Navy. ex-"Skipjack" entered the Nuclear Powered Ship and Submarine Recycling Program in Bremerton, Washington, on 17 March 1996. Recycling was completed on 1 September 1998. USS Skipjack (SSN-585) USS "Skipjack" (SSN-585), the lead ship of her class of nuclear-powered attack submarine, was the third ship of the United States Navy to be named after the Skipjack tuna. Her keel
Skipjack (cipher) for US government applications. Skipjack uses an 80-bit key to encrypt or decrypt 64-bit data blocks. It is an unbalanced Feistel network with 32 rounds. It was designed to be used in secured phones. Eli Biham and Adi Shamir discovered an attack against 16 of the 32 rounds within one day of declassification, and (with Alex Biryukov) extended this to 31 of the 32 rounds (but with an attack only slightly faster than exhaustive search) within months using impossible differential cryptanalysis. A truncated differential attack was also published against 28 rounds of Skipjack cipher. A claimed attack against the full