Handbook of Applied Cryptography - CH11, from 11.5~11.8

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Presentation transcript:

Handbook of Applied Cryptography - CH11, from 11.5~11.8 Soon-Woong Min 2017. 12.04

Agenda 11.5 The Digital Signature Algorithm (DSA) 11.6 One-time digital signatures 11.7 Other signature schemes 11.8 Signatures with additional functionality

11.5 The Digital Signature Algorithm (DSA) Authentication : Bob wants to be sure that his communication partner is Alice. Data integrity : Bob wants to be sure that Alice’s message has not been altered. i.e., contain no modification, insertion or deletion Non-repudiation : Alice cannot claim that she did not send the message, if she actually sent it. This service is particularly important in electronic commerce applications, where it is important that a consumer cannot deny the authorization of a purchase.

11.5 The Digital Signature Algorithm (DSA) Authentication : Bob wants to be sure that his communication partner is Alice. Data integrity : Bob wants to be sure that Alice’s message has not been altered. i.e., contain no modification, insertion or deletion Non-repudiation : Alice cannot claim that she did not send the message, if she actually sent it. This service is particularly important in electronic commerce applications, where it is important that a consumer cannot deny the authorization of a purchase.

11.5 The Digital Signature Algorithm (DSA) Authentication : Bob wants to be sure that his communication partner is Alice. Data integrity : Bob wants to be sure that Alice’s message has not been altered. i.e., contain no modification, insertion or deletion Non-repudiation : Alice cannot claim that she did not send the message, if she actually sent it. This service is particularly important in electronic commerce applications, where it is important that a consumer cannot deny the authorization of a purchase.

11.5 The Digital Signature Algorithm (DSA)

11.5 The Digital Signature Algorithm (DSA)

11.5 The Digital Signature Algorithm (DSA) consists

11.5 The Digital Signature Algorithm (DSA) consists

11.5 The Digital Signature Algorithm (DSA) consists

11.5 The Digital Signature Algorithm (DSA)

11.5 The Digital Signature Algorithm (DSA)

11.6 One-time digital signatures

11.6 One-time digital signatures

11.6 One-time digital signatures

11.6 One-time digital signatures

11.6 One-time digital signatures

11.6 One-time digital signatures

11.7 Other signature schemes

11.7 Other signature schemes

11.8 Signatures with additional functionality

11.8 Signatures with additional functionality

11.8 Signatures with additional functionality

11.8 Signatures with additional functionality