****************************************
     * Original algorithm by Bruce Schneier *
     ****************************************
     Note: Check is book named "Applied Cryptography"
     Its 2th Edition is THE BEST reference available!

(BLOWPAS.zip)
   - First assembly implementation by  John Lots and Walter van Holst.
   - Assembly rewrite by Jeroen Pluimers

(BLWCBC10.zip)
   - CBC Mode Implementations by Dutra Lacerda using the BlowPas Unit.

(BLWCBC11.zip)
   + Unit Rewrite improving 15X the Pascal Code (1500%)

(BLWCBC12.zip)
   + Unit  Assembly  Use improving 5X the previous Pascal Code  (500%)
     and therefore being twice as fast  than  the  BLOWPAS  386  code.

(BLCBC13.zip)
   ! Discover  of  the  Initialization  Bug   while  making a complete
     rewrite. This means that:
     THIS  VERSION  IS  NOT  COMPATIBLE  WITH PREVIOUS ONES.
   + Correction made and Source code released,  before  its  time,  to
     protect users and developers.
   * Improvements in progress in the assembly and general code  to  be
     made  public  domain  when  I  get  TASM 4.0 to make the 386 code
     (twice faster) and the general routines are converted to Objects.

(BLWCBC14.zip)
   ! Discover a small Bug herited from the the  BlowPas  Unit  in  the
     init routine of the algorithm... This one is smaller than the one
     corrected in version 1.3 but still affects security though  in  a
     much  lesser  degree (one of the 4 P-Boxes was not initialized...
     meaning that the program was still  safe,  but  not  as  much  as
     desired and/or expected)
   + Added a random CBC Init Vector. Forgotten  in  demo  version 1.3.
     This small change makes the cipher text less vulnerable to known
     text attack. And also means that:
     THIS  VERSION  IS  NOT COMPATIBLE WITH PREVIOUS ONES.
   * This also means this version is no longer a  demo  but  a  strong
     cipher program.
   * Changed my idea of also making the ASM code public.
     Still waiting to get my hands on TASM 4.0 (This is a hard life!)
     Now only the TP7 will be public.

(BLWCBC15.zip)
   + Added  a  New  Field  in  the EOF Header to restore the  original
     encrypted file extension (used only if  NO  output  argument  has
     been declared).
   + Full COMPATIBILITY with FUTURE versions.
   + Added I/O check routines and a RunTime Error Trap routine.
     (This demo is becoming a little bit more than that... Humm!)

(BLWCB15A.zip)
   = This version corrects small glitches in the interface with the user.
   ! A 'Writeln' in a wrong place produced a incorrect layout.
   + Better I/O errors control
   + Disk Full check added
   + ErrorLevel file added to benefit Power-Users
   + Read-me file with important TIPS was also added

---

For  comments,  questions or suggestions do not hesitate to contact me
by InterNet E-Mail, FidoNet NetMail or trough Compuserve.

Addresses are in the Header Comments.
Dutra Lacerda. <dulac@ip.pt>