Challenges

More conditions = difficulty upgrade

nc 155.248.210.243 42115 https://cybersharing.net/s/cb69979d372662b79d74fdc091b70b58

Submit anything... that meets my modular condition!

nc 155.248.210.243 42114 https://cybersharing.net/s/ffa2dd1bb470d80cbd37e919777a6505

I was rummaging through ictf dumpster B, as one does, and found this old rsa key. Help me decrypt it and we can share the flag 😃

'n = 0x137dcc9dfd83f0da70c45056e3a6fd68a540b4e8a01c130bcd09da355e39d226436017ba39ee3018c543743da4f29e4ad08cb39bb1673eec1dae7cb61c71c71c71c71c71c71c71c71c71c71c71c71c71c71c71c71c71'

'e = 0x10001'

'c = 0x333e8e718d231ba19c9b34c3a62bf3123cbc943234f64b2ac199fdca0aea730268e8fbc00701c82f31083c6d9f3d7daf0ff7a8968058e0cd5410241a2838456547d832fd701f1114cf2749072155c4c8cfddd4f982e'

Twice the masks Twice the ciphers Twice the plaintext … actually scratch that last part

https://cybersharing.net/s/fd3832a524a6145cbb4db01f17de5bad

??? (x2)

nc 155.248.210.243 42107 https://cybersharing.net/s/5677b8fa56bf189ad8aea6718b2f556b

Twice the masks means twice the security right?...

https://cybersharing.net/s/916f267e23b70edd82b1d6ac09fecf14

Sometimes you just need to look at things from another angle...

https://cybersharing.net/s/ab6eed9a8c4374d93fb28939514fb673

I believe you can distinguish between primes and random numbers...

https://cybersharing.net/s/84c96e61f6f6236664a97143d23c5b2e

This moai_man author is totally washed, they're just stealing ideas from Sigbovik now...

https://cybersharing.net/s/39f801714c904b11e4569e34c28e2bd2

Introducing better JWT alternative, Pickle Web Token!

http://155.248.210.243:42105 https://cybersharing.net/s/813b2f70b0ce0ff87ec3967008fa013b

page page page page page page

http://155.248.210.243:42136/ https://cybersharing.net/s/882f398f3c97f1324f82b406f2c6f7df

The hackers are back at it again. This time they're demanding all my Kavakava, help me retrieve my flag and I'll let you sneak a peek at them... note: when you find the flag it will be in all capitals ie ICTF{SOME_STRING}, submit it in all lowercase ie ictf{some_string}

Hint: The paper this challenge is based on is by one D. baby et al, note the procedure is very similar but not identical to that of the paper

https://cybersharing.net/s/4b6e20de7c97767b3fc19a4a97d8eb8c

Can you identify the impostor multiplication tables?

https://cybersharing.net/s/253e32ec530f20dacc1eb393274304a8

Escape from prolog! note: The container takes a few minutes to start.

Hint drop ~03:00 07 Jan 2025 UTC: Do you notice something here? https://github.com/tau-prolog/tau-prolog/blob/5bd606a255910d8e34ff1d721e80969af294b64c/modules/core.js#L3397

http://155.248.210.243:42145 https://cybersharing.net/s/9f23d453a0539516b0910e92b19e874a

It's 2025!

ictf{welcome_to,_probably,_the_only_square_year_you_will_ever_experience}