US3706941A
Expired / Lapsed
US
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Random number generator
Assignee: United States Atomic Energy Commission
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Filing: 1970-10-28
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Granted: 1972-12-19
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Expires: 1990-10-28
Abstract
Abstract A physical noise source is used to develop a first sequence of random bits. A second sequence of random bits is formed from the first sequence by comparing the bits in each pair of bits of the first sequence. Every other bit of the second sequence is complemented to form a sequence of random numbers. The random numbers can be combined to form words.
Inventors
- 👤 Charles E Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:41
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/58; G06F7/588
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
The method of producing a final random sequence of bits including the steps of: a. developing a first random sequence of bits from a physical noise source, and b. developing the final random sequence of bits by complementing every other bit of said first random sequence of bits with the bits intermediate said every other bits being unchanged.
Claim 2
Independent Claim
58 words
The method of producing a final random sequence of bits including the steps of: a. developing a first random sequence of bits from a physical noise source, and b. developing the final random sequence of bits by complementing every other bit of said first random sequence of bits with the bits intermediate said every other bits being unchanged.
Claim 3
Independent Claim
180 words
A method of producing a final random sequence of bits including the steps of: a. developing a first random sequence of bits from a physical noise source; b. comparing the binary value of the first bit of consecutive pairs of bits of the first random sequence of bits with the binary value of the second bit of the same pair of bits and developing a third bit having the binary value of the second bit when said first bit has one binary value and using the complement of saiD second bit as said third bit when said first bit has the other binary value; c. forming a second random sequence of bits from said third bits with the sequence of said third bits in said second random sequence of bits being the same as the sequence of said consecutive pairs of bits from which said third bits are formed; and d. developing said final random sequence of bits by complementing every other bit of said second random sequence of bits with the bits intermediate said every other bits being unchanged.
Claim 4
Independent Claim
180 words
A method of producing a final random sequence of bits including the steps of: a. developing a first random sequence of bits from a physical noise source; b. comparing the binary value of the first bit of consecutive pairs of bits of the first random sequence of bits with the binary value of the second bit of the same pair of bits and developing a third bit having the binary value of the second bit when said first bit has one binary value and using the complement of saiD second bit as said third bit when said first bit has the other binary value; c. forming a second random sequence of bits from said third bits with the sequence of said third bits in said second random sequence of bits being the same as the sequence of said consecutive pairs of bits from which said third bits are formed; and d. developing said final random sequence of bits by complementing every other bit of said second random sequence of bits with the bits intermediate said every other bits being unchanged.
Claim 5
Dependent Claim
57 words
The method of producing the final sequence of random bits of claim 2 further including the step of: a. combining a desired number of bits of said final random sequence of bits to form a random number with the sequence of bits forming said random number being the same as their sequence in said final random sequence.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |