Yandex InfoSec task

ZBKX OVL HXCZA MLKVDMNMKXB

KOFW AXCFKBB WOB IOXMCZB OBBCFMODKL ZBKX OVL HXCZA MLB DWKBK MLB OXK MVDKHKXB XKBAKFDMIKIP XKAXKBKVDKL ZBMVH DWK DPAKB ZMLD OVL HMLD (LKNMVXL MV BPBDPAKBW)

CV JMVZE KOFW AXCFKBB WOB DWK NCJJCTMVH ZBKX OVL HXCZA MLKVDMNMKXB

XKOJ ZBKX ML OVL XKOJ HXCZA ML DWKBK MLB LKDKXGMVK TWC CTVB DWK AXCFKBB O AXCFKBB FOV CQDOMV MDB XKOJ ZBKX (HXCZA) ML ZBMVH HKDZML(?) (HKDHML(?))

KNNKFDMIK ZBKX ML OVL KNNKFDMIK HXCZA ML DWKBK MLB OXK ZBKL QP DWK SKXVKI DC LKDKXGMVK

DWK AKXGMBBMCVB DWOD DWK AXCFKBB TMJJ WOIK TWKV OFFKBBMVH BWOXKL XKBCZXFKB BZFW OB

GKBBOHK YZKZKB BWOXKL GKGCXP OVL BKGOAWCXKB CV GCBD ZVME BPBDKGB DWKBK MLB OJBC LKDKXGMVK DWK AKXGMBBMCVB TWKV OFFKBBMVH NMJKB WCTKIKX JMVZE ZBKB DWK NMJKBPBDKG MLB LKBFXMQKL QKICT NCX DWMB DOBS O AXCFKBB FOV CQDOMV MDB KNNKFDMIK ZBKX (HXCZA) ML ZBMVH HKDKZML(?)

(HKDKHML(?))

BOIKL BKDZBKXML OVL BOIKL BKDHXCZAML DWKBK MLB OXX ZBKL MV BKDZBKXML OVL BKDHXCZAML AXCHXOGB DC BOIK O FCAP CN DWK FCXXKBACVLMVH KNNKFDMIK MLB DWOD TKXK BKD TWKV DWK AXCHXOG TOB KEKFZDKL (BKK KEKFIK(?)) O BKD

ZBKXML AXCHXOG FOV OBBZGK OVL LXCA AXMIMIKHKB QP BTMDFWMVH MDB KNNKFDMIK ZBKX ML QOFS OVL NCXDW QKDTKKV DWK JOIZKB MV MDB XKOJ ZBKX ML OVL BOIKL BKDZBKXML DWMB BTMDFWMVH MB LCVK IMO FOJJB DC BKDKZML(?) BKDXKZML(?)

CX BKDXKBZML(?) O BKDHXCZAML AXCHXOG AKXNCXGB DWK OVOJCHCZB DOBSB ZBMVH BKDKHML(?) BKDXKHML(?) CX BKDXKBHML(?) O AXCFKBB FOV CQDOMV MDB BOIKL BKDZBKXML (BKDHXCZAML) ZBMVH HKDXKBZML(?) (HKDXKBHML(?))

NMJKBPBDKG ZBKX ML OVL NMJKBPBDKG HXCZA ML (JMVZEBAKFMNMF) DWKBK MLB MV FCVUZVFDMCV TMDW DWK BZAAJKGKVDOXP HXCZA MLB LKBFXMQKL QKJCT OXK ZBKL DC LKDKXGMVK AKXGMBBMCVB NCX

OFFKBBMVH NMJKB BKK AODWXKBCIZDMCV(?) NCX

LKDOMJB TWKVKIKX O AXCFKBBB KNNKFDMIK ZBKX (HXCZA) ML MB FWOVHKL DWK SKXVKJ OJBC OZDCGODMFOJJP FWOVHKB DWK NMJKBPBDKG ZBKX (HXCZA) ML DC DWK BOGK IOJZK FCVBKYZKVDJP DWK NMJKBPBDKG MLB VCXGOUP WOIK DWK BOGK IOJZKB

OB DWK FCXXKBACVLMVH KNNKFDMIK ML OVL DWK BKGOVDMFB NCX NMIKAKXGMBBMCV FWKFSB OXK DWZB DWK BOGK CV JMVZE OB CV CDWKX ZVME BPBDKGB DWK NMJKBPBDKG MLB FOV QK GOLK DC LMNNKX NXCG DWK KNNKFDMIK MLB QP FOJJMVH BKDNBZML(?)

OVL BKDNBHML(?)

BZAAJKGKVDOXP HXCZA MLB DWMB MB O BKD CN OLLMDMCVOJ HXCZA MLB DWOD OXK ZBKL NCX AKXGMBBMCV FWKFSB TWKV OFFKBBMVH NMJKB OVL CDWKX BWOXKL XKBCZXFKB QKNCXK JMVZE ??? O AXCFKBB FOV QK O GKGQKX CN ZA DC ?? BZAAJKGKVDOXP

HXCZAB BMVFK JMVZE ??? O AXCFKBB FOV QK O GKGQKX CN ZA DC ????? BZAAJKGKVDOXP HXCZAB DWK FOI BPBFCVN(BFVHXCZABGOE) FOV QK ZBKL DC LKDKXGMVK DWK VZGQKX CN BZAAJKGKVDOXP HXCZAB CN TWMFW O AXCFKBB GOP QK O GKGQKX

O AXCFKBB FOV CODOMV MDB BKD CN BZAAJKGKVDOXP HXCZA MLB ZBMVH HKDHXCZAB(?)

O FWMJL AXCFKBB FXKODKL QP NCXS(?) MVWKXMDB FCAMKB CN MDB AOXXVDB ZBKX OVL HXCZAB MLB LZXMVH OV KEKFIK(?) O AXCFKBBB XKOJ ZBKX OVL HXCZA ML OVL BZAAJKGKVDOXP HXCZA MLB OXK AXKBKXIKL DWK KNNKFDMIK OVL BOIKL BKD MLB GOP QK FWOVHKL OB LKBFXMQKL MV KEKFIK(?)