In simple steps here the system:
first write text.
then divide into groups of three letters:
han dci phe r
then choose a key consisting of three letters, for example
car and encrypt first three letters with the key
Then take the result
kbf and encrypt the second three letters
kbf and the result to encrypt the next third three letters and so on until the end.
How strong is this system?
oct22 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- oct26 (updated)
Hello again , I read a little and work a much and come with this, if the old system above is weak. What about that;
will divide the plain text into groubs of three letters, then choose three pass keys each three letters ex. ( are, you, mad )
ill sec ure cip her = plain text divide into sectors
are jdq cit xay ajo = use key no.1 'are'
jdq cit xay ajo iog = cipher text round.1
you isl lbf jcb kmq = use key no.2 'you'
isl lbf jcb kmq tbx = cipher text round.2
mad vtp hvv ryx clo = use key no.3 'mad'
vtp hvv ryx clo wnm = cipher text round.3
ill secure cipher = plain text
vtp hvvryx clownm = cipher text
S0................? so embarrassing, really ill secure cipher! just leave the post open a couple of days, no more answers needed today