Namtan
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MOC Hash Function
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Hash Function (แก้ไขเนื้อหาของ note 04)
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Cryptographic Hash Function
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Hash vs Compression
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Hash vs Encryption
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MOC Hash Function Properties (แก้ไขเนื้อหาของ note 04)
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Arbitrary-length message to fixed-length digest
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Pre-image resistant (One-way property)
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Second pre-image resistant (Weak collision resistant)
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Collision resistant (Strong collision resistance)
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Hash Function Computation
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MOC Popular Hash Functions
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MD5 (Message Digest) 128-bit output
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SHA-1 (Secure Hash Algorithm) 160-bit output
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SHA-2 Family: SHA-224, SHA-256, SHA-384, SHA-512
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RIPEMD160 (RIPE Message Digest)
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SM3 (Shang Mi) 256-bit output
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Whirlpool 512-bit output
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SHA-3
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MOC Applications of Hash
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File Integrity
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Generate Data Fingerprint
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One-Time Password (OTP)
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Hash Chain
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S/KEY Protocol
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Hash chain as Timestamp
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Merkle Hash Trees
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