I need to generate unique ids for my application and I am looking for suitable algorithms. I would prefer something like this -- YYYY + MM + DD + HH + MM + SS + <random salt> + <something derived from the preceding values> F.ex. - 20100128184544ewbhk4h3b45fdg544 I was thinking about using SHA-256 or something but the resultant string...
I am using Java EE and the Spring framework. I am writing my POJOs, and the base object for my system should have a globally unique ID. My question is: what would be a "best-practice" way for me to generate this ID. This id must also be stored in a db table as a primary key. ...
I am trying to get the first part of a Guid Field with the TSQL substring function as follows SELECT SUBSTRING(Guid, 1, 8) AS Gu FROM MyTable but all i get is this error. Argument data type uniqueidentifier is invalid for argument 1 of substring function. So what is going on here? Should i treat the Guid as pure string first or...? ...
How to generate unique ID that is integer in java ? ...
Hi, I have a table with a column of unique string values. The max length of the string value is 255 char. I want to generate a unique id with the string value as input. In other words I am looking for a compact representation for a string. The unique id generated can be alpha-numeric. A useful feature to have would be to be able to reg...
Hello guys I want create an encryption with java ; How can i get CPU Id or anythings is unique in pc such as bios or ... for example System.getCpuId(); :) it's just example ;) Thanks a lot ... ...
In other words, is there an ID for each and every mobile phone--that makes it different. No two phones can have the same ID. (I'm talking about smartphones ...android, iphone, etc) ...
I wonder if there is any way to retrieve, for both a server and a client connected through ssh (OpenSSH), some unique session identifier (let this be USID). This would be used to restrict the execution of a specific (custom) software (let it be a.exe), so it can only be executed through a specific ssh session, even if other users (poten...
When a user adds a new item in my system, I want to produce a unique non-incrementing pseudo-random 7-digit code for that item. The number of items created will only number in the thousands (<10,000). Because it needs to be unique and no two items will have the same information, I could use a hash, but it needs to be a code they can sh...
What I am trying to do is create a 12 character id for articles on my website similar to how youtube handles their video id (http://www.youtube.com/watch?v=53iddd5IcSU). Right now I am generating an MD5 hash and then grabbing 12 characters of it like this: $ArticleId = substr(MD5("Article".$currentID),10,12) where $currentID is the nu...
I want a script in PHP and c# which will generate id's like the following sites are doing: Youtube http://www.youtube.com/watch?v=OdAE3cWlmHw is doing it like OdAE3cWlmHw Bit.ly http://bit.ly/2pUswX doing it like 2pUswX What will be the function to generate such type of unique id's in PHP and c#? ...
hey all, i have a table which has a primary key (UserID) this is of type UniqueIdentifier. im trying to insert a value into this field but i keep getting an error. i want to get the userID of the current user and insert the into the user_Details table, but i keep getting this error Conversion failed when converting from a character s...
I ‘concat’ an id of just loaded image into mysql user record like this. Userid … Photos_ids 12 1 2 5 7 And this photo_id should be unique. (To create unique file name). Now I get a current last id from memcache. But it's not really safely, as far as I understand. It there any other ideas? (I do not add any other records int...
Is this a correct way for id generation in MySQL ? INSERT INTO Picture (PictureId,First_pick,Title,Description,File_Name,Is_Vertical)VALUES ((SELECT max(pictureid)+1 FROM Picture),0,?,?,?,?) I mean if it is guaranted that PictureId will be unique when this query is run by many threads ? I can't modify table structure. Should I...
How do I create unique key value in PHP? I need simple unique keys with a length of 20 digits (not more than 33). ...
What is the best way to generate a unique ID in java. People generally use String id = System.currentTimeMillis+ someStaticCounter; But this approach would require synchronization in multithreaded applications. I am using try { Thread.sleep(1); //This sleep ensures that two consecutive calls from the same thread does not re...
I am building a secure app for our exec's... here is my setup. It's a somewhat Macgyver approach, but bear with me :) There are only 10 users, I have a record of each uniqueIdentifier on my backend in a database table. (This is internal only for our users, so I don't believe I am breaking the public user registration rule mentioned in ...
Im aware that MD5 has had some collisions but this is more of a high level question about hashing functions. If MD5 hashes any arbitrary string into a 32-digit hex value, then according to the Pigeonhole Principle surely this can not be unique as there are more unique arbitrary strings than there are unique 32-digit hex values ...
I'm working on an app that sends raw data to zebra printer and print out barcodes. And since every item has its own unique barcode, I need to define a variable that automatically generates unique number of 12 digits long. see example: printBar prnt = new printBar("123456789012"); Is there anyway to define a double variable and pass i...
I am writing a message transfer program between multiple clients and server. I want to generate a unique message ID for every message. It should be generated by the server and returned to the client. For message transfer, I am using a hash data structure, for example: { api => POST, username => sganesh, pass => "pass", message => "hai...