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| IN THIS ISSUE | |||||
| An Ounce of Encryption is Worth a Pound of Cure Network Encryption with xfServer By John Brunett, Senior Software Engineer, & Mark Cooper, Lead Systems Programmer Synergy/DE Tech Tip Error when defining TRUE and FALSE Quiz Synergy/DE pros, see if you can answer this question! Platform News Read a selection of recent articles Synergex Holiday Reminder We will be closed April 2 in recognition of Good Friday |
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Network Encryption with xfServer
By John Brunett, Senior Software Engineer, and Mark Cooper, Lead Systems Programmer
In a world where sensitive and confidential information is stored and transferred daily, you need to have confidence that your data is secure. Synergy/DE 9.3 has new encryption capabilities that will enhance your application’s data security. In this series of articles, we’ll start by discussing network encryption for both xfServer and xfServerPlus, then move on to data encryption.
Network encryption, as the name suggests, encrypts only data transferred across a network. That is, encryption and decryption occur only on the network; the actual encrypted data is never seen by the application. Network encryption is available with both xfServer and xfServerPlus. In this article, we’ll go over some of the network encryption basics that apply to both products, and then we’ll discuss how to use encryption with xfServer. In the next issue, we’ll go into detail on using encryption with an xfServerPlus application when connecting to an xfNetLink .NET or xfNetLink Synergy client.
With the new network encryption options, you can configure a server to either accept or demand encrypted transfers. We call these options SLAVE and MASTER modes.
> read the full article
Synergy/DE Tech Tip
Error when defining TRUE and FALSE
Question
I receive a "Not a compile-time expression" error (NOTCEXP) when I define TRUE and FALSE as shown in this example. Why?
.include WND:tools.def
.ifndef true
record
true ,d1 ,1
false ,d1 ,0
.endc
Answer
As of version 9, TRUE and FALSE are no longer defined in the tools.def file, but instead rely on the implicit execution of %TRUE and %FALSE. Because TRUE/FALSE are no longer defined in tools.def, the variables true and false in the example above come into scope. With tools.def using TRUE as an initial value, the compiler can no longer assume that TRUE should implicitly execute the routine %TRUE, and it tries to use the variable true, resulting in the error.
To fix the code above, all you have to do is add .DEFINEs for true and false, like this:
.define TRUE 1
.define FALSE 0
.include WND:tools.def
.ifndef true
record
true ,d1 ,1
false ,d1 ,0
.endc
Quiz
Synergy/DE pros, see if you can answer this question!
What is the most efficient way to sort a sequential file containing 12,000 records of 1024 bytes each?
a. Read the records into an array and use XCALL QSORT
b. Use the SORT command
c. Create an ISAM file with the appropriate key structure, and load it using a READS/STORE loop
d. Spawn the fconvert utility to create an ISAM file from the sequential file
Click here for the answer and explanation.
Platform News
Windows
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FIX: A Performance Issue in Which You Run a Query by Using a Fast Forward Cursor in SQL Server 2005 or SQL Server 2008
OpenVMS
OpenVMS Technical Update Days
Synergex Holiday Reminder
We will be closed April 2 in recognition of Good Friday
If you anticipate needing our assistance on this day, please contact us to make arrangements.