2021 challenge 1

[cipher-challenge.git] / 2020 / plaintext.7b.txt

karl operation cathedral tower has been approved and our agents are arranging to provide you with
the tnt you requested in your last messages top this will be shipped on a dutch fishing vessel which
will land at the marshes of fold leigh at two am on friday december tenth stop they will signal
their arrival by flashing their navigation lights in morsecode to spell out the word flat and you
will reply tyres top if you believe that you are being watched then abandon the rendezvous and try
again at intervals of two days three days five days and seven days stop do not attempt to make
contact with the boat or it screw in any other ways top the explosive is stable but should be
treated with care stop the fuses are the most recent product of our research and technology division
and carry triple triggers stop they have a timer circuit which maybe set for any period from three
minutes to seventeen hours stop they can also be triggered by a tripwire assembly or the fuse
mechanism can be replaced with a hand grenade mechanisms top since these charges have been shaped
for demolition use we do not recommend using these devices in combat since you have no certainty
that the charge will land in an orientation that will maximise its destructive potential stop the
tripwire option is also deprecated since it is more likely that the explosives will be discovered if
they are attached to such a trigger and moreover it would be difficult to coordinate the charges
using such a devices top the charges themselves are small but the geometry of the package will focus
the blast so it is imperative that you install these charges in accordance with the manufacturers
instructions stop in order to maximise the damage to the towers the engineers recommend that you set
charges on three of the legs of each tower with charges two and three set to explode in sequence
after charge one stop set an additional delay of thirty seconds for charge two and one minute twenty
five seconds for charge three stop as the first leg buckles it will stress the frame so that the
shockwave of the second charge will distort the supporting members stop with the third explosion the
frame should buckle resulting in the total destruction of the towers but this sequence will make
site clearance and reconstruction harder to accomplish stop the delay with charge three also
increases the likelihood that soldiers will have arrived on site in time to be caught in the third
blast increasing confusion and loss of morales top if it is possible to climb the tower in advance
of the demolition to get more detailed images of the aerial and amplifier circuitry then this should
be attempted however if there is any guard presence then no risks should be taken in this regards
top we must leave it to you to determine the most effective targets for the operation but the
demolition must happen simultaneously at all sites for two reasons stop first in order to prevent
our enemy from disrupting the operation once they realise what is happenings top second we must
leave no doubt that this was an act of wars top there is a risk that the british government may try
to reach an accommodation with the fuhrer dividing the world between their dying empire and ours
just as it is born stop the only way to ensure that we can truly supplant them is to draw them into
a war they can not win and this project will be the provocation that ensures that this will happens
top the planning division has determined that january first will be the optimal night for the attack
as it coincides with a new moon stop they suggest that you split into two teams to attack the
edmunds t caistor and ca new don sites opening a corridor along the thames for our forthcoming air
raids stop the support teams should setup lookout posts at the targets in advance of the attack so
that you can monitor guard movements and make a final assessment of the security stop following the
operation the sabotage teams should rendezvous together with the support teams at the home of the
local orts gruppe chief in south maldon stop au boat will standby to pick you all up at three forty
seven january second with a fallback rendezvous of one thirteen on the thirteenth when the search
should have died down stop you will need to gain access to a boat capable of carrying you all out to
meet its top there are very many fishing vessels in this neighbourhood and we recommend stealing one
after the operations top it might feel less secure that obtaining one in advance however we must do
everything we can to prevent suspicion in advance of the operations top if this mission succeeds
then it will be only a matter of days before the war begins and your three comrades in london will
playa crucial role in coordinating our intelligence efforts behind enemy lines stop we have been
watching and listening carefully for signs that the operation could have been compromised and as a
result of those enquiries we have discovered a new top secret agency known only by the acronym boss
stop we have been unable to infiltrate this group but it is known that the leader is someone with
the initial hand that they are taking the lead on signals intelligence stop the head of the
counterintelligence branch uses the codename pearl and we will be making every effort to discover
her identity stop while the declaration of war and the destruction of the rdf system are the central
goals of this operation the london triangle will be key to ensuring a flow of high quality
intelligence to inform our battle plans stop without their communications we will be unable to
monitor british plans placing german lives at unnecessary risks top if there is any chance that
members of your group could be captured and interrogated then you should abandon the sabotage
operation and return to tirpitz ufer stop protecting the identity of the triangle is of far greater
longterm importance to us stop we can find other ways to provoke the war but we would find it more
difficult to ensure that we can win it without a network of agents in the capital stop the mission
will be regarded as a success only if we can guarantee their safety stop to increase the security of
the london triangle it is crucial that the clock cipher device and the associated code books reach
our london agents stop the device can not be allowed to fall into enemy hands and this must be the
top priority stop if you are captured then the codebook containing the keys to the cipher must be
destroyed stop it is printed on special paper that should easily dissolve but it can also be
ingested if necessary stop when using the machine take care to erase the cipher alphabet after use
and to delete the key from the codebook to ensure that no one uses the same key twice stop this will
also reduce the risk of the keyed cipher falling into enemy hands stop if capture appears imminent
then use one of the shaped charges to destroy the device preferably burying it together with the
charge to increase the destructive power and make it harder to reconstruct stop everyone in the
movement will be praying for your success and your courage and commitment to the fatherland will be
praised forever stop you are an inspiration to us all stop wishing you luck in the final phase of
the operations top yours uncle wilhelm