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RSA - The Graduation Mystery Cache

Hidden : 9/8/2015
Difficulty:
5 out of 5
Terrain:
1 out of 5

Size: Size:   other (other)

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Geocache Description:


After The Final Exam comes of course the graduation. Here, RSA hats will be flying in celebration of a job well done! To earn a seat at the graduation ceremony, you must decrypt an RSA message.

Below you find the public key (n,e) and the encrypted message (c). If you find a way to read the encrypted message (c), you are surely an RSA graduate!

n=945712187186059594221927222778769814858263333187626122230428620554757556093826526570034740489803422088232414490071938144374781278273457198142111892218404001063122983122985652217302772974680839228825110907652005651469007193814437478127827345719814211189221840400106312298565221730277297468083922605957487472873719531710099979458542708097558876223096748057546828962068101379318500620879064700266638791941850101383263442248219353775160009041409952060596713498800931632484352301113650039071901475170292423878638479876822394253828264927283581848748709575491346099378759864364776087391359367089373029910963568668143335990769257937485743033764122354567988443489017263686062759687146204214760291056919922775127005183611408962076002910371603161802597230912383040393715238494488349313908867078921402021871159542723531343738617586306872618513979893377066903248361868322755109069023888987124605828282873104975110963363536890682183600290250667174175148677080476075830176789683660463655907490843866178158380623515684349767706582471332941015801765602785607297175743270455535399218732863546890806023462971724136545648000061721429737569964719049084329568161388790508256184725029962532366576801196591168321871143302735761352285827334281246235730899151
e=65537
c=287140807028431951231018977299232173311652622257557564615709230295339898875527244241451373473748657598852784932595789156963911948572653215415734444897223746019496339203141532349772281445599869882975088953225965501987973182026415674356836514064257560246014915495827409984280507182094409051792388945106663369152790867503144604166768060905422429429010418603986712441576009582604145910961624091641638199190379368077882486516165389979527818943347175094445763236180671552849833369290077824436140467908279769567247888945646909964966293577177139940910770560388607593419303793832923367662777777399181290106332634472066507815027233703034155875975453083305776818829890569193124440818389920964880187197378297000236040844456254299561705067126061988057921580830837757067687274285276867046662040634323074973240259382362427450174689168513654696057521428767539254862819208518190686856707422091118081745510951283948346196149211533980122486040323130874735750124310401635901118117716491866665559555381552690467502969550813169453528099369758047889567298635960254462565697904730529194460991409043027968656075797701878217003961413725432430089001349596644876338277655922626897829523331671690625524955928055227740669458877280770282383134290170630815810469638

 

Geochecker


Additional Hints (Decrypt)

Va trbpurpxre..

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)