EVERETT ENTERPRISES THE PRIVATE LINE(TM) FACT SHEET The Private Line(TM) is a Shareware PC/MS-DOS implementation of the Data Encryption Standard (DES) published by the National Bureau of Standards, United States Department of Commerce. It will encrypt any MS-DOS file (including LOTUS 1-2-3, dBase II/III, WordStar, Word Perfect, Display Write and others) and will work on IBM PC/XT/AT, PS/2 and compatibles with MS-DOS 2.0 or later, including 3.0 and 4.0 and OS/2. The Private Line complies with the encryption requirements of the data encryption algorithm. Any file encrypted by either hardware or software which meets the requirements of National Bureau of Standards Special Publication 500-20, can be decrypted by The Private Line. The Private Line contains the following features: 1. Choice of DES Mode of Operation a. electronic codebook b. cipher block chaining c. 64 or 8-bit cipher feedback d. 64 or 8-bit output feedback 2. Selection of Short Block Processing Method a. With Padding b. Without Padding 3. User-friendly menu-driven and/or command line function 4. Single or double file encryption and decryption 5. User-selected alphabetic or hexidecimal keys 6. File purge capability - file overwrite before name deleted from disk directory 7. Sorted disk directory display capability 8. Binary file conversion to printable ASCII (for telecommunications) 9. User set default switches for the following features: a. Automatic purge of input file after encryption and/or decryption b. User-prompt for purge of input file after encryption and/or decryption c. Number of times a file is overwritten before it is purged d. User-prompt before re-use of existing files e. Key entry echo f. Choice between command line program exiting to MS-DOS or The Private Line Master Menu g. Choice of DES Mode of Operation (1) electronic codebook (2) cipher block chaining (3) 64 or 8-bit cipher feedback (4) 64 or 8-bit output feedback h. Selection of Short Block Processing Method 10. Not copy-protected 11. Verifies and demonstrates compliance with DES 12. Pathnames are fully supported 13. File display (binary or ASCII) capability 14. Text file print capability The Private Line also contains the capability to change (CHDIR), create (MKDIR), and remove (RMDIR) a directory. Only 64K RAM is required. The Private Line will work on either hard or floppy disk systems. The Private Line consists of an executable program and a 46+ page user's manual which contains easy step-by-step instructions on its use. Evaluation diskettes containing the complete executable Private Line program and documentation may be ordered from Everett Enterprises by mail or telephone at a cost of $10 using money orders or checks. Checks must be drawn on U.S. banks and require a fifteen day clearance period. Please send all mail orders to EVERETT ENTERPRISES, 7839 Vervain Court, Springfield, VA 22152. Foreign orders must add $15.00 and include written assurances in accordance with U.S. Department of Commerce Export Administration Bulletin Number 240. Orders may also be submitted via CompuServe (70320,107) using Easyplex. Evaluation copies of The Private Line and its documentation, contained in TPL.ARC (program) and TPLDOC.ARC (documentation), may be downloaded from the CompuServe Bulletin Board IBMNET Special Interest Group. TPL.ARC and TPLDOC.ARC are contained in Data Library 0 (new uploads) of the Software Systems / Utilities Forum for 30 days after being uploaded and thereafter from Data Library 3 (General Utilities). PKUNPAK may be used to un-archive the files contained in TPL.ARC and TPLDOC.ARC. Evaluation copies of The Private Line may also be obtained from the PC-SIG, 1030D East Duane Ave., Sunnyvale, CA 94086, (800) 245-6717. The Private Line is contained on Disk 893 of the PC-SIG collection. After evaluation, a $30 registration fee is required for continued use. A printed User's Guide is furnished upon registration. Volume discounts, on-site licenses, and dealer inquires are welcome. Telephone orders, marketing and technical questions should be directed to Surry Everett: (703) 866-3914 (7 PM - 10 PM, M-F, EST). Requests for review copies should be submitted on letter-head stationary to EVERETT ENTERPRISES, ATTN: Surry Everett, 7839 Vervain Court, Springfield, VA 22152. Enhancements and Bug Fixes Version 7.04 is the most current version of The Private Line. Version 6.01 fixed a bug in the ECB padding routine. Version 6.02 added the capability to disable the speaker. Several users have voiced their dislike of the beeps each time the program is waiting for user input. The default is speaker disabled. The user may enable the speaker from the Additional Options Menu and change the default by saving the selected options. Version 6.02 also changed the key to return to the previous menu. In previous versions, Control-R was used. Beginning with this version, ESCAPE, will back the user out of each operation, except for the List Directory option while the directory is being input by the user. This change is downward compatible; Control-R continues to work. Version 6.03 includes the display of the current directory when the program is waiting for a file name. The hi-light bar may be moved by using the arrow and page up/page down keys. The high-lighted filename may be selected by pressing RETURN. The desired filename may still be entered by typing it and/or the associated path. If the user begins typing a file name, the high-light bar may still be moved, but when RETURN is pressed, the filename used is the one entered by the user, not the one under the high-light bar. If a filename entered by the user is erased by using the backspace key, then the filename under the high-light bar may once again be selected by pressing RETURN. Version 6.04 increased the number of filenames from 10 to 50 which are displayed when the program is waiting for a filename to be entered by the user. Version 6.04 also added the use of hexadecimal keys from the command line. Version 6.05 corrected a bug which occurred when the Private Line was used in a non EGA environment. Version 6.06 corrected a bug which occurred when the Private Line is used in a CGA environment. Version 7.0 added screen memory write routines for the master and additional option menus, the opening and closing screens, the directory display and for the screens from which the filenames contained on the current directory are displayed. Version 7.01 corrected an error in the CBC short block decryption routine. Version 7.02 corrected errors in the short block decryption routine. Version 7.03 removed the purge confirm question when autoimatic purging was selected. Version 7.04 removed the 'press RETURN to continue' after a file is converted to ASCII or binary form. CAUTION: if automatic purging is selected for either after encryption or decryption, the original file being expanded or contracted will be purged as well.