RE: File System Encryption

The Drifter[SMTP:drifter@c2.net] wrote: On Wed, 28 Aug 1996 02:55:20 +0400, Wayne Clerke <wclerke@emirates.net.ae> wrote: >Tried secdev? Edgar Swank (author of secdrv) recently posted >that secdev (note, not secdrv) does, in fact, uses 32 bit disk >access with win95. Win95 reports that the secure device is in >compatibility mode, but the host disk (and therefore the secure >volume file) is being accessed in 32 bit (disk) mode. Not sure >what issues there are with '32 bit FILE access' mode here. > >Sounds worth a try though. Please post the results if >you try this. > I have actually had Secure File System, Secure Drive, and Secure Device all installed with mounted volumes at the same time under Win95. However, 32bit file access is not the problem. When you load a TSR in Win95, the operating system forces you into 16bit DOS compatability mode. I'm not a kernal guru so I can't explain all the specifics, but it basically makes 95 act as Win-3.11 and looses multithreading (as it were) and creates serious memory paging problems if you have >32mb installed. You've got this all wrong. Only certain types of TSRs cause this. I'll leave it to an expert and just quote the author of secdrv: Edgar Swank wrote:
For those users of Win95 and SecureDrive who are concerned about loss of 32-bit disk access, I've recently learned that use of Secure Device
ftp.demon.co.uk:/pub/ibmpc/secdev/secdev14.arj
instead avoids this requirement. Although the Secure Device virtual drive is listed as in compatibility mode, the real drives are not so affected. And since the virtual drive is mapped to a dos file on one of the real drives, I believe you get 32-bit phyical drive access there as well, although access is still slowed by CPU time necessary to encrypt and decrypt.
Thanks for the reply though .. and if you need assitance with getting SECDEV working under 95, just drop me a note. Thanks for the offer ... Drifter Regards, EMail: wclerke@emirates.net.ae PGP key ID: AEB2546D FP: D663D11E DA19D74F 5032DC7E E001B702 PGP mail welcome. Voice: +971 506 43 48 53 <a href=mailto:wclerke@emirates.net.ae>Wayne Clerke</a> If you're not living on the edge, you're taking up too much space.
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Wayne Clerke