Codemakers seek algorithms immune to quantum attacks
A new member (Gerard) has just posted a comment on a post from months ago where it will not be seen requesting assistance in solving the cipher below. I’m reposting the text here and will send him a link to this page. If anyone solves it or has suggestions, please post them in the comments here.
Could you help me solve this?
NLLMS CFYSH DDODB SUQFF MSBNA AWQFW ELJWM BGNJF LSUXO SGXPQ GCBVU HEBNZ TFDBZ GOCQR HZJCK BEQVI VEOJA RQLTG ELPHL QFYBM AYUTN GDLGS GFXCR KQQHA FJNXY GCVYI EURFG SCKNN DZGUK DXQZB OBOTY OSFIO BFSHF CFMAY
Here’s a randomly generated cipher of unknown type. Two of my ID tests put the correct type in second place, but the third ID test didn’t mention the correct type. A more specific test put the correct type on top. Two of my solvers got it without a crib, but the third solver needed the crib.
UTKFT LBEVS YYVZY NWZAE PUYUE EWCET XVERR OUSTL OMXVO QROVW CUUFY
UBWHS TCBCS ECXVW DEMAM ZGLDE HOKTW UPWUF VSHOE RUSXU ZI
caesar-shifted crib: HFXJBJRZXY
Here’s a randomly generated cipher of unknown type. It took me a long time to convince myself I had the correct type even though it was in second place in all my ID tests. It also took a long time to solve it without a crib. I ran my hill-climber many times until it suddenly got a good partial solution that I was able to finish off. I’ll include a caesar-shifted crib.
60438 44382 71801 82409 48443 89435 71189 75318 44270 19843 08081
07013 18447 48943 82798 14847 50403 84684 43852 79385 04844 74843
08503 93193 84430 38279 87989 03742 18900 50090 19844 84449 38018
44380 44387 98048 27984 4833
This 2-sentence ciphertext was generated by my random con generator. The text is from gutenberg.org. My program diagnosed it as fractionated Morse and my hill-climber solved it in 1.57 seconds. I’m not going to provide a crib since I think it’s not necessary
Here’s a randomly generated cipher of unknown type. All my ID tests put the correct type on top. A hill-climber solved it without a crib but I’ll include a caesar-shifted crib.
HGOHW NTTTE FFSBI KKQHQ ATCII ZKVZQ MMQAW ABGRA NKLNE REOXL NWENI
FFQBX DVWDO SPFEA GYRUR ZPPVJ GNRQR VVEUC LOAUM IWYIR MUOOP KLSBL
PSVMK TXZJI BXAAY SBNJR FKI.
Two ciphers today!
Here’s a randomnly generated Gromark cipher. As usual none of my ID tests put Gromark on top. My PH hill-climber solved it without the primer and without a crib. I’ll add primer and crib in caesar-shifted form.
LZJPB ZLFQQ UVTIU OVDBQ MIIDE TULWG ZIBRA QKLGZ GFPPR BJCYM TWVZZ
CYZVS DGZPR HLROJ YRUAE SSQAE NROKE RZAPH RGPSR CODFM HUNBO AHOJG
caesar_shifted primer: EJWTXNCYBTYBTKNAJ
caesar-shifted crib: SMTSJXYRFS
FMTMT QQFFG EQFUU NUUGL UWFGS NSQQN YPLFE QSWFP ZGPLX QVVCM UDRNZ GBWHS LNVOQ VVCEN HSQSI VGKYF SQGOP XWFPY LOC
This con is a randomly selected sentence from the Internet. My Analyzer placed the correct cipher type in 17th place! My hill-climber solved it without a crib, but I am including a Caesar-shifted crib: HUKOVWL. Correction: The first sentence was too short, so my program selected the beginning of another sentence to lengthen it. The second sentence is truncated in the middle of a word.
Here’s a randomly generated cipher of unknown type. Two of my ID tests put the correct type on top and one put it in second place. A hill-climber solved it quickly.
ISONG SAUHO NISOP MCNCN MYGOT APOCE GUULS NEODN DBEEE LKBYE NAIKR
VINBO BNLFT TTNLP GSETL GTEST OETNR IEEOI LDSRE MNOTN YFEOM EDYRS
AEREN TACOO RFOKA HEVAT NENHH EETIH HEGAR AVDUK AAENS S.
TEMOIS HNSM CSPNHSOIIOM SPO SONN NSM SHIN SPO NONSSIHN OCEOS ES SPO SHISS IS SPO WNIS SIIS SIMMOH SIH SPO PIHIOI SPOS SIIIOM CNIS SPO THNII N ONT IS NONO N NEOWO IS ONWIS NSM N SHGEST NNS
This is a random quote from gutenberg.org. The key is also from a random sentence in gutenberg and the final word is truncated. I was able to solve it using computer-assisted word searches by patterns.