Chapter 3: Hashing. Prof Bill Buchanan OBE
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1 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Prof Bill Buchanan OBE
2 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Secret Shares. Prof Bill Buchanan OBE
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13 Brute Force - How many hash codes? 7 digit password with [a-z] how many? Ans: Time to crack billion per second: 7 digit with [a-za-z] how many? Ans: Time to crack 100 billion per second: 7 digit with [a-za-z!@#$%^&*()] how many? Ans: Time to crack 100 billion per second:
14 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Secret Shares. Prof Bill Buchanan OBE
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18 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Secret Shares. Prof Bill Buchanan OBE
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22 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Secret Shares. Prof Bill Buchanan OBE
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25 Nat McHugh 10 hours of computing on the Amazon GPU Cloud. Cost: 60 cents Used: Hashcat (on CUDA) Birthday attack: A group size of only 70 people results in a 99.9% chance of two people sharing the same birthday. M-bit output there are 2^m messages, and the same hash value would only require 2^(m/2) random messages. 18,446,744,073,709,551,616. C:\openssl>openssl md5 hash01.jpg MD5(hash01.jpg)= e06723d4961a0a3f950e7786f C:\openssl>openssl md5 hash02.jpg MD5(hash02.jpg)= e06723d4961a0a3f950e7786f
26 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Secret Shares. Prof Bill Buchanan OBE
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31 Hash Crackers/Bit Coin Miners Fast Hash One 1.536TH/s Cost 3-5,000 dollars. 25 GPU Hash Cracker An eight character NTLM password cracked in 5.5 hours. 14 character LM hash cracked in six minutes. 350 billion hashes per second.
32 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Prof Bill Buchanan OBE
33 enchmark Hashes The quick brown fox jumps over the lazy dog: SHA-1: SHA-256: SHA-512: 2fd4e1c67a2d28fced849ee1bb76e7391b93eb12 d7a8fbb307d ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592 07e547d9586f6a73f73fbac0435ed fb7d0c8d788a309d bbb642e93a252a954f d1e8a3b5ed6e1bfd fa0538f3db854fee6 MD-5: DES: Bcrypt: APR1: PBKDF2 (SHA1): PBKDF2 (SHA-256): LM Hash: NT Hash: MS DCC: LDAP (MD5): LDAP (SHA1): MS SQL 2000: MySQL: Oracle 10: Postgres (MD5): Cisco PIX: Cisco Type 7: 9e107d9d372bb6826bd81d3542a419d6 ZDeS94Lcq/6zg $2a$05$2czCv5GYgkx3aobmEyewB.ejV2hePMdbvTdCyNaSzWtlGPPjB2xx6 $apr1$zdzpe45c$3pvranpycmnc6c2g9wt9b/ $pbkdf2$5$wkr6ueu0num$0rb2bimwrmy.epyibpabt2q3hfg $pbkdf2-sha256$5$wkr6ueu0num$yrjz2ojix7ubjzwz/50vwugde I/i0ffqeU4obqC0pk4 a7b07f9948d8cc7f97c4b0b30cae500f 4e6a076ae1b04a815fa6332f69e2e231 efa9778bbc94a7360f664eb7d {MD5}9e107d9d372bb6826bd81d3542a419d6 {SHA}2fd4e1c67a2d28fced849ee1bb76e7391b93eb12 0x0100BF77CE595DCD1FC87A37B3DEBC27A8C97355CB96B8BAB 63E602662BA5D5D33B913E422499BE72FF3D9BB65DE *A4E4D26FD0C6455E23E2187C3AABE844332AA1B3 4CDA2299FCAD0499 md5d44c15daa11770f25c5350f7e5408dd1 kgykn5cqdfq1qjus B3E2D2B D E1B0E E460B594D1D53020B5C Benchmark
34 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Prof Bill Buchanan OBE
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36 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Prof Bill Buchanan OBE
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38 Chapter 3: Hashing Hashing Types. Hashing Methods. Salting. Collisions. LM and NTLM Hashes (Windows). Hash Benchmarks. Message Authentication Codes (MACs). OTP/HOTP. Prof Bill Buchanan OBE
Advanced Crypto. Author: Prof Bill Buchanan
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