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-
- LOCK (and UNLOCK) Steven Holzner
- Commands PC Magazine Vol 4, No 18
- Copyright 1985 Ziff-Davis Publishing Company
-
- ______________________________________________________
-
- Purpose: Encrypts a file, rendering it unreadable to
- anyone who does not know the user-chosen
- passphrase. Complementarily, using the same
- passphrase, de-encrypts the file.
-
- Format: LOCK [d:][path]filename[.ext] [d:][path]
- [filename][.ext]
- or
- UNLOCK [d:][path]filename[.ext] [d:][path]
- [filename][.ext]
-
- Remarks: The user-selected passphrase can be up to 64
- characters in length; the programs prompt you
- to supply it. Files to be LOCKed and
- UNLOCKed must be less than 62K in length. If
- you do not supply new filenames for the
- locked and unlocked files, the programs use
- the default filename FILE.LOC.
-
- Example: You have a file of student course evaluations
- named CONFY on drive C: that you wish to mail
- to a colleague in encrypted form. You put a
- formatted floppy disk in drive A:, and at the
- C> prompt you enter
-
- LOCK CONFY A:CRIMSON
-
- When the program asks for a passphrase, you
- enter VERITAS.
-
- The CRIMSON file on the disk will be
- unreadable. When your colleague--who must,
- of course, be told the passphrase you have
- used--puts the disk in his machine, he types
-
- UNLOCK CRIMSON GUIDE
-
- When prompted, he supplies the passphrase
- VERITAS, and his file GUIDE will be identical
- to your original file CONFY.
-
- Notes:
-
- 1. LOCK and UNLOCK do not delete any files,
- original or encoded.
-
- 2. Requires DOS version 2.0 or later.
-
-