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  2. Sound transmission class - Wikipedia

    en.wikipedia.org/wiki/Sound_transmission_class

    Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the ...

  3. Side-channel attack - Wikipedia

    en.wikipedia.org/wiki/Side-channel_attack

    Side-channel attack. An attempt to decode RSA key bits using power analysis. The left pulse represents the CPU power variations during the step of the algorithm without multiplication, the broader right pulse – step with multiplication, allowing an attacker to read bits 0, 1. In computer security, a side-channel attack is any attack based on ...

  4. Key size - Wikipedia

    en.wikipedia.org/wiki/Key_size

    Key size. In cryptography, key size or key length refers to the number of bits in a key used by a cryptographic algorithm (such as a cipher). Key length defines the upper-bound on an algorithm's security (i.e. a logarithmic measure of the fastest known attack against an algorithm), because the security of all algorithms can be violated by brute ...

  5. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.

  6. Distributed hash table - Wikipedia

    en.wikipedia.org/wiki/Distributed_hash_table

    Distributed hash table. A distributed hash table (DHT) is a distributed system that provides a lookup service similar to a hash table. Key–value pairs are stored in a DHT, and any participating node can efficiently retrieve the value associated with a given key. The main advantage of a DHT is that nodes can be added or removed with minimum ...

  7. Channel capacity - Wikipedia

    en.wikipedia.org/wiki/Channel_capacity

    Channel capacity is additive over independent channels. [4] It means that using two independent channels in a combined manner provides the same theoretical capacity as using them independently. More formally, let and be two independent channels modelled as above; having an input alphabet and an output alphabet .

  8. Resilient Packet Ring - Wikipedia

    en.wikipedia.org/wiki/Resilient_Packet_Ring

    Resilient Packet Ring (RPR), as defined by IEEE standard 802.17, is a protocol designed for the transport of data traffic over optical fiber ring networks. The standard began development in November 2000 [ 1 ] and has undergone several amendments since its initial standard was completed in June 2004.

  9. Apache Spark - Wikipedia

    en.wikipedia.org/wiki/Apache_Spark

    Apache Spark. Apache Spark is an open-source unified analytics engine for large-scale data processing. Spark provides an interface for programming clusters with implicit data parallelism and fault tolerance. Originally developed at the University of California, Berkeley 's AMPLab, the Spark codebase was later donated to the Apache Software ...

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