meaning of ones complement

1. ones complement A system used in some computers to represent negative numbers. To negate a number, each bit of the number is inverted zeros are replaced with ones and vice versa. This has the consequence that there are two reperesentations for zero, either all zeros or all ones. . . . 000. . . 00011 = +3 000. . . 00010 = +2 000. . . 00001 = +1 000. . . 00000 = +0 111. . . 11111 = -0 111. . . 11110 = -1 111. . . 11101 = -2 111. . . 11100 = -3 . . . Naive logic for ones complement addition might easily conclude that -0 + 1 = +0. The twos complement avoids this by using all ones to represent -1. One-Time Password OTP A security system that requires a new password every time a user authenticates themselves, thus protecting against an intruder replaying an intercepted password. OTP generates passwords using either the MD4 or MD5 hashing algorithms. The equivalent term "S/Key", developed by Bellcore, is a trademark of Telcordia Technologies, so the name OTP is used increasingly. See RFC 1760 - "The S/KEY One-Time Password System" and RFC 1938 - "A One-Time Password System". http://www. cs. umd. edu/~harry/jotp/.


Related Words

ones complement |

Developed & Maintained By Taraprasad.com

Treasure Words