MD4

The version of the MD algorithm released in 1991. MD5 processes 512-bit blocks of the message, using four distinct rounds of computation to produce a digest of the same length as the MD2 and MD4 algorithms (128 bits). Generally has been replaced by SHA-1 or other, more modern hashing algorithms.
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A new version of the SuperFrame that allows for more frames to be grouped together. In a T1 circuit, each of the 24 DS0 channels are sampled every 125 microseconds and 8 bits are taken from each. If you multiply the 8 bits by the 24 channels, you get 192 bits in a chain, and then add one bit for timing, you get 193 total bits in one frame. Twelve frames comprise the SuperFrame. For the Extended SuperFrame, we double the number of frames, making the total 24.
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A synchronizationframing format for a T1. In a T1 circuit, each of the 24 DS0 channels is sampled every 125 microseconds and 8 bits are taken from each. If you multiply the 8 bits by the 24 channels, you get 192 bits in a chain; and then add one bit for timing, and you get 193 total bits in one frame. Twelve frames comprise the SuperFrame. A newer version of this T1 formatting is called Extended SuperFrame (ESF).
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A hash algorithm developed by Ronald Rivest in 1989 to provide a secure hash function for 8-bit processors.
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Advanced Encryption StandardAdvanced Encryption Standard, a new encryption standard, whose development and selection was sponsored by NIST, that will support key lengths of 128, 192, and 256 bits. FIPS approved cryptographic algorithm that is a symmetric block cipher using cryptographic key sizes of 128, 192, and 256 bits to encrypt and decrypt data in blocks of 128 bits. The encryption standard selected in October 2000 by the National Institute of Standards and Technology (NIST) that is based on the Rijndael cipher.
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