ANU-Web-Quantum-RNG

7.7

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ANU-Web-Quantum-RNG

(require ANU-Web-Quantum-RNG)
	package: ANU-Web-Quantum-RNG

This package provides an implementation to fetch true random numbers from the quantum random number generator of the Australian National University (QRNG@ANU).

For a description of the QRNG@ANU JSON API, go to https://qrng.anu.edu.au/API/api-demo.php.

1 Basic Generation

The following procedures are relying on a cache holding at most 1024 16-bits unsigned integers. When the cache is empty, it’s automatically refilled by fecthing 1024 numbers from QRNG@ANU.

procedure
(awqrng-u8) → fixnum?

Returns a random 8-bits unsigned number.

Examples:

> (awqrng-u8)
51
> (awqrng-u8)
159
> (awqrng-u8)
77

procedure
(awqrng-u16) → fixnum?

Returns a random 16-bits unsigned number.

Examples:

> (awqrng-u16)
39299
> (awqrng-u16)
58914
> (awqrng-u16)
4026

procedure
(awqrng-hex16) → string?

Returns a random 16-bits hexadecimal number as a string.

Examples:

> (awqrng-hex16)
"43cc"
> (awqrng-hex16)
"8ac5"
> (awqrng-hex16)
"612a"

procedure
(awqrng-clear-cache) → void?

Clear the cache.

2 Fetching

The following procedures bypass the cache to directly fetch numbers from QRNG@ANU.

procedure
(awqrng-fetch-u8 length) → (listof fixnum?)
length : exact-nonnegative-integer?

Return a list of length random 8-bits integers.

Example:

> (awqrng-fetch-u8 10)
'(86 49 232 168 205 223 7 61 27 38)

procedure
(awqrng-fetch-u16 length) → (listof fixnum?)
length : exact-nonnegative-integer?

Return a list of length random 16-bits integers.

Example:

> (awqrng-fetch-u16 10)
'(22577 48657 55574 39258 57038 2908 48371 25155 13422 51159)

procedure
(awqrng-fetch-hex16 length size) → (listof string?)
length : exact-nonnegative-integer?
size : exact-nonnegative-integer?

Return a list of length strings, each string representing size random 16-bits hexadecimal numbers.

Examples:

> (awqrng-fetch-hex16 4 5)
'("f776f5cc9d" "f987d203ad" "8ad36a9517" "58744e09fa")
> (awqrng-fetch-hex16 5 10)
'("782278ce43c8598c0ceb"
  "733d4e5aafebbf690c1f"
  "d10af473c98de0601e07"
  "33548b255c1adb3d64a3"
  "80f342093b4ab24dcada")

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