Use A Uuid To Generate Encryption Key
About RandomKeygen Our free mobile-friendly tool offers a variety of randomly generated keys and passwords you can use to secure any application, service or device. Simply click to copy a password or press the ' Generate ' button for an entirely new set. Jan 22, 2015 The specific UUID version is an implementation detail that has changed in the past and may change again in the future. Do not depend upon the UUID that is returned to be Version 5. As the UUID produced is versioned, it should never return a value of NULLKEY. The GUID keys can be predicted, at least those generated by.NET / WinAPI. Also keep in mind that the GUID does not even have a true 128bit randomness, because the version number is fixed. This gives you a very weak key in the first place. To make matters worse, several versions of the GUID algorithm suffer from predictability. In the above specification, IDENTIFIED BY points to the location of the API Key which is now stored in the file; CONTAINER is for use in a multitenant environment. Enter ALL to set the keystore in all the pluggable databases (PDBs) in this container database (CDB), or CURRENT for the current PDB.; Set the TDE Master Encryption Key. Next you must create a TDE master encryption key that is.
As for the AES key, I am hashing the company GUID the database record belongs to using SHA256 (resulting in the same key on each server that is trying to decrypt the record from the DB) I am unable to use SQL encryption for various reasons and must use code for encryption/decryption.
You use the PSCipherJava utility's buildkey command to build new Triple DES encryption keys.The buildkey command adds a new Triple DES encryption key stored in the psvaultfile (the key file). If you generate new versions of the key file,the system appends the new version of the key to the end of the keyfile.
To invoke the commandon a Windows server, change to the directory where PSCipher residesand enter:
To invoke the commandon UNIX, change to the directory where PSCipher resides and enter:
Select one web serverin your system to generate the new version of the key file. The pscipher.batand PSCipher.sh utilities only run in the Java environment of theweb server. After you have created the new key file, you then copythe new version of psvault from the initial server to the appropriatedirectories on all the appropriate servers in your system. The psvaultfile is stored in different directories depending on your web servervender (as described in the following sections). On the applicationserver the psvault file resides in <PS_HOME>secvault.
Note: If you are not usingthe default encryption key and you have generated a unique encryptionkey, note that each time you add a new server to your system, youwill need to copy the key file to the appropriate location on thatserver. For example, if you are using the default key version ({V1.1}),any server you add to the system and install PeopleTools on will alsohave the default key version ({V1.1}). As such, no further steps arerequired. However, if you have generated a new key, giving the versionnumber a value of {V1.2} or greater, then you need to make sure tocopy that key file to the added server(s). Also, each time you updatethe key, you need to ensure that the new version of the key file iscopied to the additional servers in your system.
Warning! When you upgrade tonew PeopleTools releases, as in PeopleTools 8.48 to PeopleTools 8.50,you will need to backup any modifications you have made to the keyfile using PSCipher in the previous release and reapply that samekey file to the appropriate servers onto which you have installedthe new PeopleTools release.
This weekend Dr Nic shared with us a well written article discussing the shortcomings of auto-incrementing (serial) keys and an alternative approach. While discussing the article the question came up about how to go about using UUID keys in our applications and what we have to do within PostgreSQL in order to use them. PostgreSQL out of the box defines a UUID Data Type which is a great start. We then have three options for generating UUID's,
- Within your application code
- Within the database using the extension uuid-ossp
- Within the database using the extension pgcrypto
Generating them within our application will work quite nicely and is a good way to go, unless you want the database to handle creating these automatically for you which is usually where our point of view.
Only use uuid-ossp if you have a real and specific need for the functions it provides If your only need is to generate and index them then you do not need uid-ossp. (Update: See below.) For generating UUID's within the database an easy place to start is to use the gen_random_uuid () function from the pgcrypto extension.
So how do we use this function? First we need to create the extension in the database we wish to use it with,
/minecraft-seed-generator-code-key.html. This is how you load pre-compiled shared library code which adds functionality into your PostgreSQL database.
Note specifically that the extension must be created (loaded) once for each database in which you wish to use it. Once it has been loaded into a running instance of the database server it will be there for use from then on spanning restarts.
Also be aware that if you have dumped and restored the database from one server to another running instance then depending on the method of the dump/restore you may need to load it into this new instance after restoring.
Once you have done this you can generate a random id,
Which returns a UUID Data Type.
Let's create a table with a UUID primary key and see how we use the gen_random_uuid() function to populate our IDs for us,
We can now add entries into our newly created Stark & Wayne Contacts table,
Let's examine our table now,
We see that each row has a UUID id field which is the primary key and was automatically generated for us.
Discussion
It was pointed out by @drewblas (thank you Drew!) that using gen_random_uuid() from pgcrypto has a negative side effect with respect to keyspace fragmentation on disk for the tables. Drew told us that:
Random produces very fragmented inserts that destroy tables. Use uuid_generate_v1mc() [instead] .. the keys are seq because they're time based. So all inserts go to the same data page without random io.
Use A Uuid To Generate Encryption Keys
This makes sense due to the random probability distribution of the keys, it should be fragemented. This fragmentation however is not so good for efficiency of the database system itself. In order to gain the benefits of using UUID primary keys with lower keyspace fragmentation perhaps Drew points out that it is better to use uuid_generate_v1mc() from the uuid-ossp extension because underneath it is using a time based seq algorithm which you can read about in the postgresql documentation.