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Old 02-22-2008
Universal algorithms for channel decoding of uncompressed sources
HPL-2007-128 Universal algorithms for channel decoding of uncompressed sources - Ordentlich, Erik; Seroussi, Gadiel; Verdu, Sergio; Viswanathan, Krishnamurthy
Keyword(s): Channel Decoding, Denoising, Discrete Memoryless Channels, Universal algorithms, Lossless compression, Joint source-channel decoding, Soft decoding, Belief propagation.
Abstract: In many applications, an uncompressed source stream is systematically encoded by a channel code (which ignores the source redundancy) for transmission over a discrete memoryless channel. The decoder knows the channel and the code but does not know the source statistics. This paper proposes several u ...
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LEARN ABOUT OSX

cc_crypto

CC_crypto(3cc)							       LOCAL							    CC_crypto(3cc)

NAME

     Common Crypto -- libSystem digest library

DESCRIPTION

     The libSystem Common Crypto library implements a wide range of cryptographic algorithms used in various Internet standards. The services pro-
     vided by this library are used by the CDSA implementations of SSL, TLS and S/MIME.

OVERVIEW

     libSystem contains the Common Crypto collection of algorithms. Digest and encryption algorithms contained in this library are optimized for
     speed.  The algorithms have been collected from various sources and chosen for their performance characteristics.	Since libSystem is linked
     into all executables it is preferable for applications to use these functions rather than implementing their own versions.

NOTES

     To use the digest functions with existing code which uses the corresponding openssl functions, #define the symbol COMMON_DIGEST_FOR_OPENSSL
     in your client code (BEFORE including <CommonCrypto/CommonDigest.h> ).

     You can *NOT* mix and match functions operating on a given data type from the two implementations; i.e., if you do a CC_MD5_Init() on a
     CC_MD5_CTX object, do not assume that you can do an openssl-style MD5_Update() on that same context.

     The interfaces to the encryption and HMAC algorithms have a calling interface that is different from that provided by OpenSSL.

HISTORY

     The Common Crypto collection of functions started to become available in OS X 10.4 and later.

SEE ALSO

     CC_MD5(3cc), CC_SHA(3cc), CCHmac(3cc), CCCryptor(3cc)

BSD
								   April 5, 2007							       BSD