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Last Block Encryption Think This is More Secure

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  • Last Block Encryption Think This is More Secure

    I call this LBCBFBB ,last block cypertext borrow from before block

    more secure then adding zero's or other know pad methods.
    so why shall we give someone know plaintext to play with?
    ------------------
    last block procedure

    LOCAL pad$ , before$
    before$=sMessage
    GET$ #1, LastBlockSize , sMessage


    IF (LEN(sMessage) MOD 16) <> 0 THEN
    ' is not mod 16 so now we borrow the pad bytes from the previous block of already ENCODED plaintext.

    IF EnCode=1 THEN
    pad$=RIGHT$(WorkString,16) ' from memory just encoded (so encoded plaintext)

    ELSE
    pad$=RIGHT$(before$,16) ' from disk not yet decoded (so encoded plaintext)
    END IF

    FOR i = 1 TO 16 - (LEN(sMessage) MOD 16) ' pad the string to mod 16
    sMessage = sMessage + MID$(pad$,i,1)
    NEXT
    END IF

    Ok Guys Shoot At It, Better Methods Welcome
    To Ask or Not To Ask ?
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