SDH
Architecture multiplexing by interleaving ofbytes allowing the concentration and multiplexing transmission paths digital synchronized.
Networks ATM often based on SDH.
SDSI
(Simple Distributed Security Infrastructure) Distributed Security Infrastructure Simple
New proposal PKI by Ronald L. Rivest (MIT) And Butler Lampson (Microsoft). It provides a means of defining groups and affiliations with these groups, lists of Access ControlAnd security policies. SDSI's design emphasizes namespaces associated local rather than a global namespace hierarchy.
SDSL
Symmetric DSL. This technology does not like theADSL the simultaneous transmission of voice and data, but carry a flow equivalent in the uplink and downlink, adjustable from 64 kbps to 2 Mbps depending on the needs and characteristics of the line.
SEAL
(Software-optimized Encryption Algorithm) Algorithm Encryption optimized for Software
Algorithm stream cipher fast 32-bit machines designed by Rogaway and Coppersmith.
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