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- этимология
Что (кто) такое symmetrical or symmetric - определение
DSL TRANSMITTING DIGITAL DATA OVER TELEPHONE NETWORK COPPER WIRES, WHERE DOWNSTREAM BANDWIDTH (NETWORK → SUBSCRIBER) EQUALS UPSTREAM BANDWIDTH (SUBSCRIBER → NETWORK)
Symmetrical Connection; Symmetric DSL; Symmetrical Digital Subscriber Line; Symmetric Digital Subscriber Line
Symmetric-key algorithm
ALGORITHM
Symmetric Algorithms; Symmetric key; Symmetric encryption; Symmetric key cryptography; Symmetric cypher; Shared key; Symmetric cipher; Symmetric-key cipher; Symmetric key algorithms; Symmetric cryptography; Private-key cryptography; Symmetric key encryption; Symmetric key algorithm; Reciprocal cipher; Reciprocal encipherment; Private key cryptography; Symmetric-key encryption algorithm; Symmetric-key cryptography; Private-key; Symmetric algorithm; Private-key encryption; Symmetrical encryption
Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both the encryption of plaintext and the decryption of ciphertext. The keys may be identical, or there may be a simple transformation to go between the two keys.
symmetric key cryptography
ALGORITHM
Symmetric Algorithms; Symmetric key; Symmetric encryption; Symmetric key cryptography; Symmetric cypher; Shared key; Symmetric cipher; Symmetric-key cipher; Symmetric key algorithms; Symmetric cryptography; Private-key cryptography; Symmetric key encryption; Symmetric key algorithm; Reciprocal cipher; Reciprocal encipherment; Private key cryptography; Symmetric-key encryption algorithm; Symmetric-key cryptography; Private-key; Symmetric algorithm; Private-key encryption; Symmetrical encryption
<cryptography> A cryptography system in which both parties
have the same encryption key, as in {secret key
cryptography}.
Opposite: public-key cryptography.
(1998-06-09)
private-key cryptography
ALGORITHM
Symmetric Algorithms; Symmetric key; Symmetric encryption; Symmetric key cryptography; Symmetric cypher; Shared key; Symmetric cipher; Symmetric-key cipher; Symmetric key algorithms; Symmetric cryptography; Private-key cryptography; Symmetric key encryption; Symmetric key algorithm; Reciprocal cipher; Reciprocal encipherment; Private key cryptography; Symmetric-key encryption algorithm; Symmetric-key cryptography; Private-key; Symmetric algorithm; Private-key encryption; Symmetrical encryption
<cryptography> As opposed to public-key cryptography, a
cryptographic method in which the same key is used to encrypt
and decrypt the message. Private-key algorithms include the
obsolescent Data Encryption Standard (DES), triple-DES
(3DES), the Advanced Encryption Standard (AES), also known
as Rijndael, Blowfish, Twofish RC2, RC4, RC5 and RC6.
A problem with private-key cryptography is that the sender and
the recipient of the message must agree on a common key via
some alternative secure channel.
Public-key cryptography gives an answer to this problem.
(2008-02-07)
Википедия
Symmetric digital subscriber line
A symmetric digital subscriber line (SDSL) is a digital subscriber line (DSL) that transmits digital data over the copper wires of the telephone network, where the bandwidth in the downstream direction, from the network to the subscriber, is identical to the bandwidth in the upstream direction, from the subscriber to the network. This symmetric bandwidth can be considered to be the opposite of the asymmetric bandwidth offered by asymmetric digital subscriber line (ADSL) technologies, where the upstream bandwidth is lower than the downstream bandwidth. SDSL is generally marketed at business customers, while ADSL is marketed at private as well as business customers.
More specifically, SDSL can be understood as:
- in the wider sense, an umbrella term for all DSL variant which offer symmetric bandwidth, including IDSL, which offers 144 kbit/s, HDSL, HDSL2, G.SHDSL, which offers up to 22.784 Mbit/s over four pairs of copper wires, as well as the SDSL variant below
- in the narrow sense, a particular proprietary and non-standardized DSL variant for operation at 1.544 Mbit/s or 2.048 Mbit/s over a single pair of copper wires, without support for analog calls on the same line
- a term used by ETSI to refer to G.SHDSL
