KDCs often operate in systems when some users may have permission to use certain resources at some times but not at any times.= = = Alonzo Church = = =
k eɪ d iː s iː z WORD_BOUNDARY ɔ f ə n WORD_BOUNDARY ɑ p ə ɹ ɹ eɪ t WORD_BOUNDARY ɪ n WORD_BOUNDARY s ɪ s t ə m z WORD_BOUNDARY w ɛ n WORD_BOUNDARY s ʌ m WORD_BOUNDARY j uː z ə ɹ z WORD_BOUNDARY m eɪ h ʌ v WORD_BOUNDARY p ə ɹ m ɪ ʃ ə n WORD_BOUNDARY t ə WORD_BOUNDARY j uː z WORD_BOUNDARY s ɜː t ə n WORD_BOUNDARY ɹ ɪ s ɔ ɹ s ɪ z WORD_BOUNDARY æ t WORD_BOUNDARY s ʌ m WORD_BOUNDARY t aɪ m z WORD_BOUNDARY b ʌ t WORD_BOUNDARY n ɑ t WORD_BOUNDARY æ t WORD_BOUNDARY ɛ n i WORD_BOUNDARY t aɪ m z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY ʌ l ɑ n z oʊ WORD_BOUNDARY t̠ʃ ɜː t̠ʃ WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY