Crypto Challenge Contest Part 4 🎥 – Test Your Cryptography Skills!

#cryptology, #cryptography, #cryptanalysis

This is the fourth video of our first "Crypto Challenge Contest". For detailed descriptions of the rules, please watch the video :-)
Here, we have also our last video with ciphertexts. In the next video, we will announce the winners.

Rules (short version):
- You may break ciphertexts and win points. The one with the most points at the end of the contest wins a copy of Gaines’ book “Cryptanalysis: a study of ciphers and their solution”. Another winner will be randomly chosen from all other participants
- The contest is in no way connected to or sponsored by YouTube, Google, or Facebook
- Everyone (who is no CrypTool team member) is allowed to participate – you don’t need to be a subscriber of our channel or our Facebook page. Participation is for free
- At the end of the contest, we will delete all personal data (e.g. names and email addresses)
- The official start of the contest is the 14th August 2020
- Solutions may be sent until the release of the next contest video- The basic idea of the contest: having fun with solving crypto challenges :-)

Hint: Clearly, everyone is only allowed to participate ONCE in the contest. Thus, if you send solutions for a video multiple times, e.g. from different email addresses, you are removed from the contest.

If you are interested in learning the basics of cryptology, you should also have a look at our video series about basics of cryptology – also for beginners: https://youtu.be/jbumW7Ym03o

You may download the latest version of CrypTool 2 from here: https://www.cryptool.org/en/ct2/downloads

Transcriptions:

Ciphertext 23:
925905930923921095904390901309913916922930196906390915910195059291309295908190
903098930927169293390093091159309911239219292930920905914916924095931390229089
059915309259905930196195193297390908019294095309901930194169159916091139917098
019902059922109039390921923092291292910229293922190196915309903109197089905290

Ciphertext 25:

NVFLOGGHITCZPZARZDNQHKQTIUJPRYDOICPLCRGTMAVCVFDKHHFWLTNJIRDBLJYKNIATEFYZ
BKWBVGAEVSIPJIVGVPBSKKEATJIMLFONRSHBQQXGQUYCRXYVTWEGLEEYNHHFOGIJFVYVDTR
ZLIJFZYJRGNGEXHLKYLFHXBJSXARWGHEYAIGKDGBMXEDVZWLUCGKVQIGOXBAACTOFIGDHEI
MEYLSAQUUQIYAYMKQTQGIGHBLVBLLIXJPGCKOTJGIWCXCYJVADMCBQREOBJXKXLMTWKUKW
TDKUOUHHXFDTKAXLBRFYLUNIPVWVONYNCSPQTPVVWKCPHEAUEGJNGYVJKPARGCZKIKLZU
GGHDWEANJYXXYHPQCKWEMHSMGEGGRQOZZLRXBNGHFSKNRTVPJLVLHWTNAISELBURLRZO
EKZZCNYXWQOLLISZSPGONQSFMZLTJUUSJURQPXTTJEUIDDDGJNRHJGKNGYHNHJJLNSSZJM
VKNQGLWMZNCQTYOGIBPQVGXHBVEIVJ

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