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Reading Description of Encrypted Tables |
Mon, Nov 13 2006 10:01 PM | Permanent Link |
I'm using custom encryption in the DBISAMEngine (OnCryptoInit,
OnEncryptBlock and OnDecryptBlock) to improve the compressibility of less sensitive tables. Some tables will use standard encryption. Based on the help for DBISAMTable.Description, I thought I could use the description to store information about the type of encryption I use in each table. However, even though the table doesn't need to be open, the password and custom encryption events are required before accessing the description of encrypted tables. 1) Is there a way to make the description accessible first - "clear text" so to speak? 2) I'm considering using a different extension for files with custom encryption, since they can't be accessed with the standard DBISAM tools, anyway. 3) Another possibility is an unencrypted table with properties of the tables, such as (a code for) the encryption status and method. I'm interested in schemes that other DBISAM users may have used. Chuck Hall | |
Mon, Nov 13 2006 10:28 PM | Permanent Link |
I realized that I will have difficulty mixing standard and custom
encryption, since it is handled at the engine level. Apparently, only one DBISAMEngine can be used at a time. That makes using custom and standard encryption impractical, unless I can be sure only one type will be used at a time, unless... Is there a way to use more than one DBISAMEngine in an application? Chuck Hall wrote in message news:A5B92D7A-1C8D-4D68-96B3-04E4DB5759A8@news.elevatesoft.com... > I'm using custom encryption in the DBISAMEngine (OnCryptoInit, > OnEncryptBlock and OnDecryptBlock) to improve the compressibility of less > sensitive tables. Some tables will use standard encryption. > > Based on the help for DBISAMTable.Description, I thought I could use the > description to store information about the type of encryption I use in > each table. However, even though the table doesn't need to be open, the > password and custom encryption events are required before accessing the > description of encrypted tables. > > 1) Is there a way to make the description accessible first - "clear text" > so to speak? > > 2) I'm considering using a different extension for files with custom > encryption, since they can't be accessed with the standard DBISAM tools, > anyway. > > 3) Another possibility is an unencrypted table with properties of the > tables, such as (a code for) the encryption status and method. > > I'm interested in schemes that other DBISAM users may have used. > > Chuck Hall | |
Tue, Nov 14 2006 3:40 AM | Permanent Link |
Roy Lambert NLH Associates Team Elevate | Did you know you don't have a FROM in your headers so your name doesn't appear - makes it weird when I click next unread message and this hidden thing pops into view.
Roy Lambert |
Tue, Nov 14 2006 8:54 AM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Chuck,
<<1) Is there a way to make the description accessible first - "clear text" so to speak? >> Not without modifying the DBISAM source code. -- Tim Young Elevate Software www.elevatesoft.com |
Tue, Nov 14 2006 8:55 AM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Chuck,
<< I realized that I will have difficulty mixing standard and custom encryption, since it is handled at the engine level. Apparently, only one DBISAMEngine can be used at a time. That makes using custom and standard encryption impractical, unless I can be sure only one type will be used at a time, unless... Is there a way to use more than one DBISAMEngine in an application? >> Unfortunately, no. It follows the singleton instance pattern since it represents the whole DBISAM engine. -- Tim Young Elevate Software www.elevatesoft.com |
Tue, Nov 14 2006 9:46 AM | Permanent Link |
Thanks Roy
Yes, I noticed that (with Outlook Express) and posted some test messages in the test area. I tried a different newsreader, which worked, but I didn't like it. Now, I'm using Windows Live Mail beta, which I like, but it appears to have inherited the behavior from Outlook settings. My properties look complete, and my messages work fine in other newsgroups. I'll try unsubscribing and resubscribing to DBISAM. "Roy Lambert" <roy.lambert@skynet.co.uk> wrote in message news:7E831918-EE35-4F11-8228-FBB28F834622@news.elevatesoft.com... > Did you know you don't have a FROM in your headers so your name doesn't > appear - makes it weird when I click next unread message and this hidden > thing pops into view. > > Roy Lambert > | |
Tue, Nov 14 2006 10:01 AM | Permanent Link |
"Chuck Hall" | Roy,
I unsubscribed and resubscribed to ElevateSoft's newsgroups, and a new test message in the test area worked right, showing my from value. This should tell whether it works within an existing thread. Chuck Hall wrote in message news:E66BF63F-F1B4-41D0-A616-211E84CCCF04@news.elevatesoft.com... > Thanks Roy > > Yes, I noticed that (with Outlook Express) and posted some test messages > in the test area. I tried a different newsreader, which worked, but I > didn't like it. > > Now, I'm using Windows Live Mail beta, which I like, but it appears to > have inherited the behavior from Outlook settings. My properties look > complete, and my messages work fine in other newsgroups. I'll try > unsubscribing and resubscribing to DBISAM. > > "Roy Lambert" <roy.lambert@skynet.co.uk> wrote in message > news:7E831918-EE35-4F11-8228-FBB28F834622@news.elevatesoft.com... >> Did you know you don't have a FROM in your headers so your name doesn't >> appear - makes it weird when I click next unread message and this hidden >> thing pops into view. >> >> Roy Lambert >> |
Tue, Nov 14 2006 11:20 AM | Permanent Link |
Roy Lambert NLH Associates Team Elevate | Chuck
That's nice I can see you now. You're the second person I know this has happened to. Roy Lambert |
Tue, Nov 14 2006 12:07 PM | Permanent Link |
"Chuck Hall" | Roy:
I may be the first person you know this was happening to - still. You participated in the thread I started on "Replication in ElevateDB", and you commented on the missing "From". Anyway, I hope it stays resolved with re-subscribing. Chuck Hall "Roy Lambert" <roy.lambert@skynet.co.uk> wrote in message news:7B203C29-0D60-4204-949C-1D22ED018E61@news.elevatesoft.com... > Chuck > > > That's nice I can see you now. You're the second person I know this has > happened to. > > Roy Lambert > |
Tue, Nov 14 2006 12:16 PM | Permanent Link |
"Chuck Hall" | Tim:
What about deciding within the init, decrypt and encrypt events how to handle the encryption. I see that the sender is the DBISAMEngine, which doesn't seem to help much. I looked at the runtime properties of the DBISAMEngine, and nothing looked promising. Is there a way to determine what dataset or file is being processed from the DBISAMEngine? Chuck Hall "Tim Young [Elevate Software]" <timyoung@elevatesoft.com> wrote in message news:61878BFE-E06F-4C9B-86D3-4073A562D936@news.elevatesoft.com... > Chuck, > > << I realized that I will have difficulty mixing standard and custom > encryption, since it is handled at the engine level. Apparently, only one > DBISAMEngine can be used at a time. That makes using custom and standard > encryption impractical, unless I can be sure only one type will be used at > a time, unless... > > Is there a way to use more than one DBISAMEngine in an application? >> > > Unfortunately, no. It follows the singleton instance pattern since it > represents the whole DBISAM engine. > > -- > Tim Young > Elevate Software > www.elevatesoft.com > |
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