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“>IPSec Cryptographic ComponentsThis article looks at the cryptographic component technologies used inIPSec.Data Encryption Standard (DES) EncryptionDES encryption includes the following components:Encryption and decryption algorithmsMatching shared secret keys on each peerInput cleartext data to be encryptedAt the core of DES is the encryption algorithm:A shared secret key is input to the algorithm. Then cleartext data is fedinto the algorithm in fixed-length blocks and is converted  
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