Algorithm

AES (Advanced Encryption Standard)

AES-CBC Bit Flipping Attack

AES-CBC Padding Oracle Attack

AES-ECB Padding Attack

Ansible Vault Secret

Atbash Cipher

Base32, Base64

Caesar Cipher

Camellia Cipher

Certificates

Cryptography

DES (Data Encryption Standard)

Diffie-Hellman Key Exchange

ECC (Elliptic Curve Cryptography)

ECDSA (Elliptic Curve Digital Signature Algorithm)

Fernet

GPG (GNU Privacy Guard)

HMAC

KDBX Files

Kerberos TGT Cracking

Length Extension Attack

MD4, MD5

Multi-Tap Cipher

NTLM, NTLMv2

PEM (Privacy Enhanced Mail)

PGP (Pretty Good Privacy)

PKCS (Public-Key Cryptography Standards)

PowerShell Credentials

RAR (Roshal Archive)

RIPEMD

ROT13, ROT47

RPNG (Pseudo Random Number Generator) Guessing

RSA (Rivest Shamir Adleman)

SHA1 Hash Collision Attack

SHA1, SHA256, SHA512

Transposition Cipher

Vigenere Cipher

Key Derivation Function

Bcrypt

PBKDF2

Scrypt

Tool

John the Ripper

Math

Chinese Remainder Theorem

Exponentiation

GCD (Greatest Common Divisor)

Modular Congruence

Quadratic Residue

Bit Wise Operation

AND Bitwise Operations

OR Bitwise Operations

Shift Bitwise Operations

XOR Bitwise Operations

Conversion

Convert Binary to Int in Python

Convert Bytes to Hex in Python

Convert Bytes to Int in Python

Convert Bytes to Matrix in Python

Convert Bytes to String in Python

Convert Character to Binary in Python

Convert Character to Unicode in Python

Convert Hex to Bytes in Python

Convert Hex to Int in Python

Convert Int to Binary in Python

Convert Int to Bytes in Python

Convert Int to Hex in Python

Convert Int to String in Python

Convert Matrix to Bytes in Python

Convert String to Binary in Python

Convert String to Bytes in Python

Convert String to Int in Python

Convert Unicode to Character in Python

Zero Padding in Python

Base32, Base64

Last modified: 2023-04-04

Cryptography

Base-* are numeral systems. Especially Base32 and Base64 are often used.

Decode

Base16

base16 -d encoded.txt
echo -n '68656c6c6f0a' | base16 -d

Base32

base32 -d encoded.txt
echo -n 'NBSWY3DP' | base32 -d

Base64

base64 -d encoded.txt
echo -n 'aGVsbG8=' | base64 -d

PowerShell Encoded Command

If we found the PowerShell command contained -encodedcommand when malware analysis, we can decode it with CyberChef.
1. Paste the PowerShell command.
2. Add the "From Base64" operation to Recipe.
3. Add the "Decode Text" operation to Recipe and choose the "UTF-16LE" Encoding.

Encode

Base16

base16 example.txt
echo -n 'hello' | base16

Base32

base32 example.txt
echo -n 'hello' | base32

Base64

base64 example.txt
echo -n 'hello' | base64

Generate Random Passwords

Base64

openssl rand -base64 3

Algorithm

Key Derivation Function

Tool

Math

Bit Wise Operation

Conversion

Base32, Base64

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