Title:
【発明の名称】乱数を生成する方法および装置
Document Type and Number:
Japanese Patent JP2000515699
Kind Code:
A
Abstract:
For generating random numbers the output of a random pulse generator having a radioactive source is monitored and the number of decay events detected counted over a predetermined time period. The number of detected events is then compared to one or more selected numbers and a first signal, for example binary '1', is produced where the detected count is equal to the one or more selected numbers and a second signal, binary '0', is produced where the detected count does not equal the one or more selected numbers. The time period is determined so that the probability of the first signal being generated is equal to the probability of the second signal being generated. In this way a truly random number can be generated by repetition of the method steps described above producing a stream of binary '1's and '0's. Virtually no radioactivity is required for the apparatus to operate and it can in principle be integrated into a single chip.
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Inventors:
Shilton, Mark Golder
Application Number:
JP50773998A
Publication Date:
November 21, 2000
Filing Date:
August 06, 1997
Export Citation:
Assignee:
Nycomed Amersham plc
International Classes:
G06F7/58; H03K3/84; (IPC1-7): H03K3/84; G06F7/58
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)