Center for Appropriate Transport youth in need of a hands-on education. CAT is an alternative education program registered with the Oregon Department of Education and as such is one of the few publicly funded bicycle schools in the United States. Center for Appropriate Transport The Center for Appropriate Transport (CAT) is a non-profit community center dedicated to bicycles and alternative transport located in Eugene, Oregon, United States. CAT holds publicly funded educational workshops for teaching youth from ages 12 to 21. Within the facility there is a public bicycle repair workspace and a bike machine-shop for the design and manufacture of special-purpose bikes, particularly
Block cipher mode of operation since each block gets decrypted in exactly the same way. Ehrsam, Meyer, Smith and Tuchman invented the Cipher Block Chaining (CBC) mode of operation in 1976. In CBC mode, each block of plaintext is XORed with the previous ciphertext block before being encrypted. This way, each ciphertext block depends on all plaintext blocks processed up to that point. To make each message unique, an initialization vector must be used in the first block. If the first block has index 1, the mathematical formula for CBC encryption is while the mathematical formula for CBC decryption is CBC has been the most