waves over lambda

Problem

We made alot of substitutions to encrypt this. Can you decrypt it? Connect with nc 2019shell1.picoctf.com 32282.

Solution

1. nc 2019shell1.picoctf.com 32282:

    -------------------------------------------------------------------------------
    yvmhqbxj urqr wj pvdq csbh - cqrgdrmyp_wj_y_virq_sblktb_oxxuxxvkdy
    -------------------------------------------------------------------------------
    krxnrrm dj xurqr nbj, bj w ubir bsqrbtp jbwt jvlrnurqr, xur kvmt vc xur jrb. krjwtrj uvstwmh vdq urbqxj xvhrxurq xuqvdhu svmh orqwvtj vc jrobqbxwvm, wx ubt xur rccryx vc lbewmh dj xvsrqbmx vc rbyu vxurq'j pbqmjbmt rirm yvmiwyxwvmj. xur sbnprqxur krjx vc vst crssvnjubt, krybdjr vc uwj lbmp prbqj bmt lbmp iwqxdrj, xur vmsp ydjuwvm vm trye, bmt nbj spwmh vm xur vmsp qdh. xur byyvdmxbmx ubt kqvdhux vdx bsqrbtp b kva vc tvlwmvrj, bmt nbj xvpwmh bqyuwxryxdqbssp nwxu xur kvmrj. lbqsvn jbx yqvjj-srhhrt qwhux bcx, srbmwmh bhbwmjx xur lwzzrm-lbjx. ur ubt jdmerm yurrej, b prssvn yvlosrawvm, b jxqbwhux kbye, bm bjyrxwy bjoryx, bmt, nwxu uwj bqlj tqvoort, xur obslj vc ubmtj vdxnbqtj, qrjrlksrt bm wtvs. xur twqryxvq, jbxwjcwrt xur bmyuvq ubt hvvt uvst, lbtr uwj nbp bcx bmt jbx tvnm blvmhjx dj. nr rayubmhrt b crn nvqtj sbzwsp. bcxrqnbqtj xurqr nbj jwsrmyr vm kvbqt xur pbyux. cvq jvlr qrbjvm vq vxurq nr twt mvx krhwm xubx hblr vc tvlwmvrj. nr crsx lrtwxbxwir, bmt cwx cvq mvxuwmh kdx osbywt jxbqwmh. xur tbp nbj rmtwmh wm b jrqrmwxp vc jxwss bmt ragdwjwxr kqwsswbmyr. xur nbxrq juvmr obywcwybssp; xur jep, nwxuvdx b jorye, nbj b krmwhm wllrmjwxp vc dmjxbwmrt swhux; xur irqp lwjx vm xur rjjra lbqju nbj swer b hbdzp bmt qbtwbmx cbkqwy, udmh cqvl xur nvvtrt qwjrj wmsbmt, bmt tqbowmh xur svn juvqrj wm twboubmvdj cvstj. vmsp xur hsvvl xv xur nrjx, kqvvtwmh virq xur doorq qrbyurj, kryblr lvqr jvlkqr rirqp lwmdxr, bj wc bmhrqrt kp xur booqvbyu vc xur jdm.

2. Run quipqiup to get the following:

    ------------------------------------------------------------------------------- congrats here is your flag - frequency_is_c_over_lambda_ptthttobuc ------------------------------------------------------------------------------- between us there was, as i have already said somewhere, the bond of the sea. besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarnsand even convictions. the lawyerthe best of old fellowshad, because of his many years and many virtues, the only cushion on deck, and was lying on the only rug. the accountant had brought out already a box of dominoes, and was toying architecturally with the bones. marlow sat cross-legged right aft, leaning against the mizzen-mast. he had sunken cheeks, a yellow complexion, a straight back, an ascetic aspect, and, with his arms dropped, the palms of hands outwards, resembled an idol. the director, satisfied the anchor had good hold, made his way aft and sat down amongst us. we exchanged a few words lazily. afterwards there was silence on board the yacht. for some reason or other we did not begin that game of dominoes. we felt meditative, and fit for nothing but placid staring. the day was ending in a serenity of still and exquisite brilliance. the water shone pacifically; the sky, without a speck, was a benign immensity of unstained light; the very mist on the essex marsh was like a gauzy and radiant fabric, hung from the wooded rises inland, and draping the low shores in diaphanous folds. only the gloom to the west, brooding over the upper reaches, became more sombre every minute, as if angered by the approach of the sun.

Flag

picoCTF{frequency_is_c_over_lambda_ptthttobuc}