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21-631: SILC can refer to: SILC (protocol) (Secure Internet Live Conferencing), a protocol that provides secure conferencing services over the Internet Silicom Connectivity Solutions (NASDAQ: SILC), one of the RAD Group Companies Solomon Islands Labour Corps , a World War II organization of native Solomon Islanders who served in the allied war effort Stress-induced leakage current , an increase in

42-456: A network packet is a formatted unit of data carried by a packet-switched network . A packet consists of control information and user data; the latter is also known as the payload . Control information provides data for delivering the payload (e.g., source and destination network addresses , error detection codes, or sequencing information). Typically, control information is found in packet headers and trailers . In packet switching ,

63-412: A user is able to use any nickname, even if one is already in use. The real identification in the protocol is performed by unique Client ID. The SILC protocol uses this to overcome nickname collision, a problem present in many other protocols. All messages sent in a SILC network are binary, allowing them to contain any type of data, including text, video, audio, and other multimedia data. The SKE protocol

84-598: Is different from Wikidata All article disambiguation pages All disambiguation pages SILC (protocol) The SILC protocol can be divided in three main parts: SILC Key Exchange (SKE) protocol, SILC Authentication protocol and SILC Packet protocol . SILC protocol additionally defines SILC Commands that are used to manage the SILC session. SILC provides channels (groups), nicknames, private messages, and other common features. However, SILC nicknames, in contrast to many other protocols ( e.g. IRC ), are not unique;

105-454: Is just a version of the man-in-the-middle attack . The solution offered is that chat members generate their own public-private keypair for asymmetric encryption . The private key is shared only by the chat members, and this is done out of band. The public key is used to encrypt messages into the channel. This approach is still open to compromise, if one of the members of the chat should have their private key compromised, or if they should share

126-497: Is often carried as the payload inside an Ethernet frame, which has its own header and trailer. Per the end-to-end principle , IP networks do not provide guarantees of delivery, non-duplication, or in-order delivery of packets. However, it is common practice to layer a reliable transport protocol such as Transmission Control Protocol on top of the packet service to provide such protection. The Consultative Committee for Space Data Systems ( CCSDS ) packet telemetry standard defines

147-514: Is optionally possible to digitally sign all channel messages. It is also possible to protect messages with a privately generated channel key that has been previously agreed upon by channel members. Private messages between users in a SILC network are protected with session keys. It is, however, possible to execute SKE protocol between two users and use the generated key to protect private messages. Private messages may be optionally digitally signed. When messages are secured with key material generated with

168-620: Is used to establish session key and other security parameters for protecting the SILC Packet protocol. The SKE itself is based on the Diffie–Hellman key exchange algorithm (a form of asymmetric cryptography ) and the exchange is protected with digital signatures . The SILC Authentication protocol is performed after successful SKE protocol execution to authenticate a client and/or a server. The authentication may be based on passphrase or on digital signatures , and if successful gives access to

189-430: The bandwidth of the transmission medium is shared between multiple communication sessions, in contrast to circuit switching , in which circuits are preallocated for the duration of one session and data is typically transmitted as a continuous bit stream . In the seven-layer OSI model of computer networking , packet strictly refers to a protocol data unit at layer 3, the network layer . A data unit at layer 2,

210-399: The data link layer , is a frame . In layer 4, the transport layer , the data units are segments and datagrams . Thus, in the example of TCP/IP communication over Ethernet , a TCP segment is carried in one or more IP packets , which are each carried in one or more Ethernet frames . The basis of the packet concept is the postal letter: the header is like the envelope, the payload is

231-587: The SILC Toolkit. The SILC Toolkit is dual-licensed and distributed under both the GNU General Public License (GPL) and the revised BSD license. As described in the SILC FAQ, chats are secured through the generation of symmetric encryption keys. These keys have to be generated somewhere, and this occurs on the server. This means that chats might be compromised, if the server itself is compromised. This

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252-593: The SKE protocol or previously agreed upon key material (for example, passphrases ) SILC provides security even when the SILC server may be compromised. SILC was designed by Pekka Riikonen between 1996 and 1999 and first released in public in summer 2000. A client and a server were written. Protocol specifications were proposed, but ultimately request for publication was denied in June 2004 by IESG and no RFC has been published to date. At present time, there are several clients,

273-482: The elementary stream between PES packet headers. A typical method of transmitting elementary stream data from a video or audio encoder is to first create PES packets from the elementary stream data and then to encapsulate these PES packets inside an MPEG transport stream (TS) packets or an MPEG program stream (PS). The TS packets can then be transmitted using broadcasting techniques, such as those used in an ATSC and DVB . In order to provide mono compatibility ,

294-586: The entire content inside the envelope, and the footer would be your signature at the bottom. Network design can achieve two major results by using packets: error detection and multiple host addressing . Communications protocols use various conventions for distinguishing the elements of a packet and for formatting the user data. For example, in Point-to-Point Protocol , the packet is formatted in 8-bit bytes, and special characters are used to delimit elements. Other protocols, like Ethernet, establish

315-584: The gate leakage current of a MOSFET, due to defects Sydney Institute of Language and Commerce , a college in Shanghai University The summer language program at the American International School-Salzburg SILC , Swedish International Liberal Center See also [ edit ] EU-SILC, European Union Statistics on Income and Living Conditions (or Survey on Income and Living Conditions) Topics referred to by

336-639: The key with another, without agreement of the group. SILC uses a similar pattern to IRC, in that there is no global "SILC network" but many small independent networks consisting of one or several servers each, although it is claimed that SILC can scale better with many servers in a single network. The "original" network is called SILCNet, at the silc.silcnet.org round-robin. However, as of May 2014, it has only one active (though unstable) server out of four. Most SILC networks have shut down due to declining popularity of SILC. Packet (information technology) In telecommunications and computer networking ,

357-561: The most advanced being the official SILC client and an irssi plugin. SILC protocol is also integrated to the popular Pidgin instant messaging client. Other GUI clients are Silky and Colloquy . The Silky client was put on hold and abandoned on the 18th of July 2007, due to inactivity for several years. The latest news on the Silky website was that the client was to be completely rewritten. As of 2008, three SILC protocol implementations have been written. Most SILC clients use libsilc, part of

378-504: The protocol used for the transmission of spacecraft instrument data over the deep-space channel. Under this standard, an image or other data sent from a spacecraft instrument is transmitted using one or more packets. Packetized elementary stream (PES) is a specification associated with the MPEG-2 standard that allows an elementary stream to be divided into packets. The elementary stream is packetized by encapsulating sequential data bytes from

399-453: The relevant SILC network. The SILC Packet protocol is intended to be a secure binary packet protocol, assuring that the content of each packet (consisting of a packet header and packet payload) is secured and authenticated. The packets are secured using algorithms based on symmetric cryptography and authenticated by using Message Authentication Code algorithm, HMAC . SILC channels (groups) are protected by using symmetric channel keys. It

420-405: The same term [REDACTED] This disambiguation page lists articles associated with the title SILC . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=SILC&oldid=1113682397 " Category : Disambiguation pages Hidden categories: Short description

441-437: The start of the header and data elements by their location relative to the start of the packet. Some protocols format the information at a bit level instead of a byte level. A packet may contain any of the following components: IP packets are composed of a header and payload. The header consists of fixed and optional fields. The payload appears immediately after the header. An IP packet has no trailer. However, an IP packet

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