Loki

In cryptography, LOKI89 and LOKI91 are block ciphers designed as possible replacements for the Data Encryption Standard (DES). The ciphers were developed based on a body of work analysing DES, and are very similar to DES in structure. The LOKI algorithms were named for Loki, the god of mischief in Norse mythology.
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Loki or Loke is the mythical giant in Norse mythology. In the Eddas, one of the few sources of information regarding the figure, Loki is described as a son of the giants Fárbauti and Laufey. Loki also had two brothers (Helbindi & Byleist) of whom nothing is known. The same source also describes Loki as the "contriver of all fraud" and features Loki mixing freely with the gods for a long time, even becoming Odin's blood brother before murdering Baldr. After the murder, the Æsir restrain Loki with the internal organs of his children and he is eventually freed to fight on the side of the Jotun against the Æsir at Ragnarök.
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Noun
1. (Norse mythology) trickster; god of discord and mischief; contrived death of Balder and was overcome by Thor
(hypernym) Norse deity
(classification) Norse mythology

(n.)
The evil deity, the author of all calamities and mischief, answering to the African of the Persians.
  

[Norse] Loki is one of the major deities in the Norse pantheon. He is a son of the giant Farbauti ("cruel striker") and the giantess Laufey. He is regarded as one of Aesir, but is on occasion their enemy. He is connected with fire and magic, and can assume many different shapes (horse, falcon, fly). He is crafty and malicious, but is also heroic: in that aspect he can be compared with the trickster from North American myths. The ambivalent god grows progressively more unpleasent, and is directly responsible for the death of Balder, the god of light. Loki's mistress is the giantess Angrboda, and with her he is the father of three monsters. His wife is Sigyn, who stayed loyal to him, even when the gods punished him for the death of Balder. He was chained to three large boulders; one under his shoulders, one under his loins and one under his knees. A poisonous snake was placed above his head. The dripping venom that lands on him is caught by Sigyn in a bowl. But every now and then, when the bo...
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Loki [from Danish lys, Swed ljus, Anglo-Saxon leoht, Latin lux light; cf liechan, liuhan to enlighten; Greek leukos white.] In Norse myths, the giant grown to godhood who represents the active human mind: on one hand he is related to Logi (flame), destructive wildfire; on the other he is called Lopt (lofty), when he represents aspiring, elevating intelligence. Like Lucifer, he is the enlightener of humankind who became transformed in popular stories into a culprit guilty of all the ills that can result from the misuse of mind.
Loki is descended from giant stock, but he is accepted among the Aesir (gods) as one of them and is considered a blood brother to Odin. Although as prankster and mischief maker he causes trouble for his brother deities at every turn, nevertheless, when appealed to, it is Loki who with his ready wit saves each situation. The panorama of evolution is thus epitomized: the pure deities must use mind, self-consciousness and free will unhampered, unruly though these properties are, to gain understanding. That is the purpose for which they embody; this means that the human thinking faculty must earn its godhood by freely choosing to cooperate with the divine purpose.
Loki is thus a complex figure of markedly dual character: his giant ancestry, which rightly belongs to the past, suggests the only partly evolved human nature, uninspired by divine wisdom. At the same time he is associated with the divine fire of intelligence. This godlike quality entails free will, which in our human condition is often unwise unless guided by inspiration and brings misfortune when acting on its won.
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