Top "Uuid" questions

A UUID (Universally Unique IDentifier) is an identifier that is created with the intent of being, as the name suggests, universally unique.

Are Java random UUID's predictable?

I would like to use a cryptographically secure primary key for sensitive data in a database - this cannot be …

java security random uuid
How to get uuid or mac address from client in Java?

I'm looking for a solution for a Java based webapplication to uniquely identify the client. The server is in the …

java web-applications uuid mac-address
Generating a Hardware-ID on Windows

What is the best way to generate a unique hardware ID on Microsoft Windows with C++ that is not easily …

c++ windows unique uuid copy-protection
UUID.randomUUID() vs SecureRandom

I am trying to understand the advantages of using UUID.randomUUID() over SecureRandom generator as the former uses securerandom internally.

java uuid secure-random
Is there a method to generate a standard 128bit GUID (UUID) on the Mac?

Is there a built in function equivalent to .NET's Guid.NewGuid(); in Cocoa? My desire is to produce a string …

cocoa macos guid uuid core-foundation
Python - Why use anything other than uuid4() for unique strings?

I see quit a few implementations of unique string generation for things like uploaded image names, session IDs, et al, …

python unique uuid
How to choose between UUIDs, autoincrement/sequence keys and sequence tables for database primary keys?

I'm looking at the pros and cons of these three primary methods of coming up with primary keys for database …

database database-design sequence uuid auto-increment
Is Oracle's SYS_GUID() UUID RFC 4122 compliant?

I wonder if Oracle's SYS_GUID() function returns a RFC 4122 compliant UUID. For example: SQL> select sys_guid() from …

oracle uuid rfc
How to generate an uuid in google sheet?

How to generate an uuid in google sheet (for exemple ccb8a660-91c9-a556-58e0-4fa7-229516872004). …

google-apps-script google-sheets uuid google-sheets-custom-function
Initialization failed for Block pool <registering> (Datanode Uuid unassigned)

What is the source of this error and how could it be fixed? 2015-11-29 19:40:04,670 FATAL org.apache.hadoop.hdfs.…

java hadoop hdfs uuid disk