diff options
| -rw-r--r-- | lib/securerandom.rb | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/securerandom.rb b/lib/securerandom.rb index 1365c66565..4a97ff8a78 100644 --- a/lib/securerandom.rb +++ b/lib/securerandom.rb @@ -230,7 +230,11 @@ module SecureRandom # p SecureRandom.uuid #=> "2d931510-d99f-494a-8c67-87feb05e1594" # p SecureRandom.uuid #=> "62936e70-1815-439b-bf89-8492855a7e6b" # - # See RFC 4122 for UUID. + # The version 4 UUID is purely random (except the version). + # It doesn't contain meaningful information such as MAC address, time, etc. + # + # See RFC 4122 for details of UUID. + # def self.uuid ary = self.random_bytes(16).unpack("NnnnnN") ary[2] = (ary[2] & 0x0fff) | 0x4000 |