Dolphin Encrypt

Dolphin Encrypt uses a symmetric key encryption process to encrypt data on
MS-DOS computers. Information is encrypted using an encryption key which
is kept secret. Without this key encrypted files cannot be read and are
safe from unauthorized access. The key can be from 10 to 60 characters in
length, so it can be a phrase which is easy to remember. Upper and lower
case are equivalent, so you don't have to remember exact capitalization.

Dolphin Encrypt can encrypt multiple files with a single command. For
example, DE2 E *.* encrypts (E = "encrypt") all files in the current
subdirectory (the program asks you to enter the encryption key, and erases
it from memory upon termination). To convert all files with .TXT suffix to
encrypted files with .ENC suffix (leaving the original files unchanged)
you would use the command DE2 E *.TXT *.ENC. File pathnames are supported
and there is extensive error checking. Decryption is equally simple: Just
use D for "decrypt" instead of E. If you wish to transmit encrypted data
as email then Dolphin Encrypt can be told to output the encrypted data as
text. There is no limit on the size, the type or the number of files.
Files are normally compressed during encryption (smaller file size means
faster transmission when sending encrypted files electronically). Screen
output can be sent to a file or to a printer for a record of operations.

The encryption process makes use of the RSA Data Security, Inc., MD5
Message Digest Algorithm, and combines several different methods of
encipherment. Encrypted files appear even to special analysis tools as
composed of random bytes. Dolphin Encrypt requires DOS 2.1 or higher. A
printed manual clearly explains the use of the software with examples, and
includes a detailed description of the encryption process used.

Dolphin Encrypt Advanced Version

This has all of the features described above, and also encrypts whole
floppy disks. All common disk sizes are supported and are automatically
recognized. To make an encrypted copy in drive B: of a disk in drive A:
you would use DE2 E A: B:

Dolphin Encrypt Advanced Version has additional command line options,
including the options of echoing or not echoing the key and of decrypting
and displaying only (without writing any plaintext to disk). The Advanced
Version can be run silently from another application program to encrypt or
decrypt data. Dolphin Encrypt Advanced Version has a script language (with
if-else-endif) which allows automation of frequently-performed, complex or
conditional operations. The Advanced Version package also includes utility
programs to read text files, compare files, purge files and wipe a disk
clean; these can be called from scripts. There is also a utility for
creating hidden subdirectories.

Dolphin Software, 48 Shattuck Sq. #147, Berkeley, CA 94704
510-464-3009

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