Crypto CTFs Tricks
Online Hashes DBs
Google it
Encoders
Most of encoded data can be decoded with these 2 ressources:
Substitution Autosolvers
https://quipqiup.com/ - Very good !
Caesar - ROTx Autosolvers
Atbash Cipher
Similar to BASE64
Check all bases with: https://github.com/mufeedvh/basecrack
Base32 [A-Z2-7=]
NBXWYYLDMFZGCY3PNRQQ====
Base58 [123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]
2yJiRg5BF9gmsU6AC
Base62 [0-9A-Za-z]
g2AextRZpBKRBzQ9
Base64 [A-Za-z0-9+/=]
aG9sYWNhcmFjb2xh
Base85 --> Like Ascii85
ATOM-128 [/128GhIoPQROSTeUbADfgHijKLM+n0pFWXY456xyzB7=39VaqrstJklmNuZvwcdEC]
MIc3KiXa+Ihz+lrXMIc3KbCC
HAZZ15 [HNO4klm6ij9n+J2hyf0gzA8uvwDEq3X1Q7ZKeFrWcVTts/MRGYbdxSo=ILaUpPBC5]
DmPsv8J7qrlKEoY7
MEGAN35 [3GHIJKLMNOPQRSTUb=cdefghijklmnopWXYZ/12+406789VaqrstuvwxyzABCDEF5]
kLD8iwKsigSalLJ5
ZONG22 [ZKj9n+yf0wDVX1s/5YbdxSo=ILaUpPBCHg8uvNO4klm6iJGhQ7eFrWczAMEq3RTt2]
ayRiIo1gpO+uUc7g
ESAB46 []
3sHcL2NR8WrT7mhR
MEGAN45 []
kLD8igSXm2KZlwrX
TIGO3FX []
7AP9mIzdmltYmIP9mWXX
TRIPO5 []
UE9vSbnBW6psVzxB
FERON74 []
PbGkNudxCzaKBm0x
GILA7 []
D+nkv8C1qIKMErY1
Citrix CTX1 []
MNGIKCAHMOGLKPAKMMGJKNAINPHKLOBLNNHILCBHNOHLLPBK
http://k4.cba.pl/dw/crypo/tools/eng_atom128c.html - 404 Dead: https://web.archive.org/web/20190228181208/http://k4.cba.pl/dw/crypo/tools/eng_hackerize.html
HackerizeXS [╫Λ↻├☰┏]
╫☐↑Λ↻Λ┏Λ↻☐↑Λ
Morse
.... --- .-.. -.-. .- .-. .- -.-. --- .-.. .-
UUencoder
begin 644 webutils_pl
M2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(
M3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/
F3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$%(3TQ!2$],04A/3$$`
`
end
XXEncoder
begin 644 webutils_pl
hG2xAEIVDH236Hol-G2xAEIVDH236Hol-G2xAEIVDH236Hol-G2xAEIVDH236
5Hol-G2xAEE++
end
YEncoder
=ybegin line=128 size=28 name=webutils_pl
ryvkryvkryvkryvkryvkryvkryvk
=yend size=28 crc32=35834c86
BinHex
(This file must be converted with BinHex 4.0)
:#hGPBR9dD@acAh"X!$mr2cmr2cmr!!!!!!!8!!!!!-ka5%p-38K26%&)6da"5%p
-38K26%'d9J!!:
ASCII85
<~85DoF85DoF85DoF85DoF85DoF85DoF~>
Dvorak keyboard
drnajapajrna
A1Z26
Letters to their numerical value
8 15 12 1 3 1 18 1 3 15 12 1
Affine Cipher Encode
Letter to num (ax+b)%26
(a and b are the keys and x is the letter) and the result back to letter
krodfdudfrod
SMS Code
Multitap replaces a letter by repeated digits defined by the corresponding key code on a mobile phone keypad (This mode is used when writing SMS). For example: 2=A, 22=B, 222=C, 3=D... You can identify this code because you will see several numbers repeated.
You can decode this code in: https://www.dcode.fr/multitap-abc-cipher
Bacon Code
Substitude each letter for 4 As or Bs (or 1s and 0s)
00111 01101 01010 00000 00010 00000 10000 00000 00010 01101 01010 00000
AABBB ABBAB ABABA AAAAA AAABA AAAAA BAAAA AAAAA AAABA ABBAB ABABA AAAAA
Runes

Compression
Raw Deflate and Raw Inflate (you can find both in Cyberchef) can compress and decompress data without headers.
Easy Crypto
XOR - Autosolver
Bifid
A keywork is needed
fgaargaamnlunesuneoa
Vigenere
A keywork is needed
wodsyoidrods
Strong Crypto
Fernet
2 base64 strings (token and key)
Token:
gAAAAABWC9P7-9RsxTz_dwxh9-O2VUB7Ih8UCQL1_Zk4suxnkCvb26Ie4i8HSUJ4caHZuiNtjLl3qfmCv_fS3_VpjL7HxCz7_Q==
Key:
-s6eI5hyNh8liH7Gq0urPC-vzPgNnxauKvRO4g03oYI=
Samir Secret Sharing
A secret is splitted in X parts and to recover it you need Y parts (Y <=X).
8019f8fa5879aa3e07858d08308dc1a8b45
80223035713295bddf0b0bd1b10a5340b89
803bc8cf294b3f83d88e86d9818792e80cd
http://christian.gen.co/secrets/
OpenSSL brute-force
Tools
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