Escape the Link
August 23, 2025 Towfiqur Rahman
While investigating a phishing attempt, you stumble upon a suspicious link in an old email archive. The link looks strange, filled with percent signs and unusual sequences. Could it be hiding a secret message for someone savvy enough to decode it? Your task is to carefully interpret the link and reveal the hidden secret.The suspicious […]
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Hidden in Plain Touch
August 23, 2025 Towfiqur Rahman
During an audit of a secure facility, you discover a misplaced note on a desk. The note is filled with unusual raised dot patterns, almost like a secret code meant to be read by touch. Security cameras caught no one writing it, but it seems someone left a hidden clue for authorized personnel. Can you […]
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The Careless Spy
August 23, 2025 Towfiqur Rahman
A spy working for a rival organization tried to send a secret flag back to his handler. He thought he was clever and used RSA to encrypt the message before sending it across the wire. Unfortunately for him, the spy generated his RSA keys on an old laptop with very limited entropy. The primes he […]
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Simple Substitution
August 23, 2025 Towfiqur Rahman
While monitoring communications, you found a suspicious note. It looks meaningless at first glance, but careful observation may reveal a hidden message. CVCUU-DUG{tuspohs_fodszqujouq_sfqufdut_uif_xfblftu_mjol} Flag Format: BUBT-CTF{*****} Enter your flag Please enter the correct flag below. Make sure there are no extra spaces! Check my flag! Flags are checked regardless of capitalisation: IWin is the same […]
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Climbing
August 19, 2025 Towfiqur Rahman
The flag has been encrypted with a climbing key. Decrypt the flag: 112-102-101-100-114-128-59-123-122-60-62-120-79-62-126-119-67-131-143 Enter your flag Flags are checked regardless of capitalisation: IWin is the same as iwin. Check my flag!
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Encoded
August 16, 2025 Towfiqur Rahman
Encoded The flag is encoded, but not encrypted, in the ELF binary.Find the encoded data to get the flag. Base64 Decoder Link You can decode from this web Check your answer Enter your flag Check my flag! Flags are checked regardless of capitalisation: IWin is the same as iwin.