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sudsy 's
version from
2016-10-27 14:41
Event IDs
Question Answer
Event ID: 531 User Account Disabled
Event ID: 532 User Account Expired
Event ID: 535 User Account Power Disabled
Event ID: 539 User Account Locked out

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Hashing Algorithms
Question Answer
MD5 Produces 128-bit message digest. No longer considered strong hash function.
SHA Modeled after MD5. Produce 160-bit, 256-bit, 384-bit, 512-bit.
NTLM Used for Microsoft products. Introduced in later versions of Windows NT.
RIPEMD Has 128-bit, 160-bit, 256-bit and 320-bit versions.
HMAC Used to verify both integrity and authenticity of messages.

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Symmetric Algorithm
Question Answer
DES (Data Encryption Standard) - Block-Cipher. Encrypts data in 64-bit blocks using a 56-bit key with 8 bits used for parity. Weak algorithm.
3DES (Triple or 3DES) Processes each block of data three times using different key each time.
AES (Adv Encryption Standard) - 128-bit, 192-bit or 256-bit block cipher. Supercedes DES.
Blowfish Freely available 64-bit block cipher. No longer considered strong.
Twofish Block size of 128-bit and key sizes up to 256 bits.
RC4,5,6 Series of algorithms with variable key lengths. Stream and block ciphers. TLS, WPA, SSL, WEP.

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Asymmetric Algorithm
Question Answer
RSA (Rivest-Shamir-Adleman) - First successful algorithm for public key encryption. Variable key length and block size. Considered highly secure.
DH (Diffie Hellman) - Provides secure key exchange.
ECC (Elliptic Curve Cryptography) - Public key encryption that leverages the algebraic structures of elliptic curves over finite fields. Used in wireless and mobile devices.
DHE Uses ephemeral keys to provide secure key exchange.
ECDHE Incorporates the use of ECC and ephemeral keys.

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Difference
Question Answer
MD5 Hashing
SHA Hashing
NTLM Hashing
RIPEMD Hashing
HMAC Hashing
DES Symmetric
3DES Symmetric
AES Symmetric
Blowfish Symmetric
Twofish Symmetric
RC4,5,6 Symmetric
RSA Asymmetric
DH Asymmetric
ECC Asymmetric
DHE Asymmetric
ECDHE Asymmetric

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