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Ralf C. Hauser April 4, 1995 Reviewer : Xiao Wang

USING THE INTERNET TO REDUCE SOFTWARE PIRACY on Anonymous Receipts, Anonymous ID Cards, and Anonymous Vouchers. Ralf C. Hauser April 4, 1995 Reviewer : Xiao Wang. Introduction. New Software Vending Method Anonymous ID Cards Anonymous Receipts Fully Network situation. Background.

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Ralf C. Hauser April 4, 1995 Reviewer : Xiao Wang

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  1. USING THE INTERNET TO REDUCE SOFTWARE PIRACYon Anonymous Receipts, Anonymous ID Cards, and Anonymous Vouchers Ralf C. Hauser April 4, 1995 Reviewer : Xiao Wang

  2. Introduction • New Software Vending Method • Anonymous ID Cards • Anonymous Receipts • Fully Network situation

  3. Background • Physical software copy is valuable • Dishonest customer can cheat producer by copying illegally • Vendor can cheat user and producer by selling bootleg software copy Producer $200 Software vendor customer $300

  4. New Software Vending Method • Show ID to Vendor • Get less valuable software copy • Get bill with unique SW-ID • Use policy file to verify vendor and producer • Pay producer • Vendor gets profit from producer • erase client from debt list by SW-ID • Vendor may remind consumer • Vendor ask profit from producer with consumer’s receipt producer Addr. sw-id Sw-id ,$295,Addr $95 receipt policy database $5,ID vendor customer Sw-id receipt bill Addr. sign sw-id Sw-id policy receipt*2

  5. Evaluation • Stop piracy • Physical copy is not valuable , paid sw-id is valuable • Stop bootleg copy from vendor • Stop dishonest customer • Intrude privacy • Show customer’s ID to vendor • Give producer customer’s address for receipt • How to protect privacy ?

  6. Anonymous ID Cards The notary registers the consumer's address and signs asymmetric public key without adding any address and name information. And include secure hash value of a digital passport picture of the consumer . Sn(PseudonymA , EAtemp , MD5(A.img)) • hands a diskette containing this notary statement and the passport picture • cashier's PC displays the picture to verify the holder of this digital ID • vendor sends a reminder to the notary • notary can reveal the identity of the consumer during dispute $5,A_ID database policy vendor customer Sw-id receipt bill sign , sw-id , A_ID A_ID Addr. Key picture notary What is the use of the public key ?

  7. Anonymous Receipts $+Y+ SW-ID • Create Y (hash of the receipt information by a secured one-way function) • Trustee pay out funds , forward Y SW-ID • Create Ss(signature key of producer) return to trustee as receipt • Trustee forward receipt to customer and remove customer information after customer getting receipt . Producer (date, Y,amount,product, ..)Ss Trustee (Payment mechanism) receipt Customer $+Y User-ID SW-ID Policy Info Random V What is the use of the Random value ?

  8. Fully Network • use public key to secure the delivery of the software • Replace Trustee with payment mechanisms . • Release software after getting paid to producer Producer $ Notice $ receipt A_ID Vendor Customer Release Software

  9. Conclusion • This paper shows a new vending method which can reduce software piracy . • It also gives solution to keep privacy and can provide identity at the same time -- using one way cryptography .

  10. Questions • Judging from this paper , do you think the author use the hash value of the photo MD5(A.img) as the Anonymous ID number ? If not , it can be the ID number or not ?

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