幾個重要密碼學觀念信託金鑰Key Escrow System (KES)

‧ supply end-to-end privacy (symmetric cryptosystem)

　‧ for investigation, the Law Enforcement Agency(LEA) can decrypt the ciphertext using key Escrow

　‧ the balance between the privacy of people and investigation of government

　‧ applied to PSTN network

　‧ LEA fetches from two Trusted Center respectively (TC1,TC2)

　‧ US government encourages users to use key Escrow

Wire tap

SKIPJACK

encrypted

communication

Bad guy

Court system

Court order

request

Court

order

Certification

Device Unique ID

Key componenet

Certification

Device Unique ID

F.B.I.

NIST

Device Unique ID

Key componenet

Device Unique ID

Key componenet

Seed material

Product

vendor

Product

vendor

Programming

DOT

Foundry

Chip

NOTE :信託金鑰系統雖然具有爭議性,但已成為歐美主要國家之加密政策

方向,以利於國家安全及公共治安的需要.

OECD建議身份辨識金鑰:不列入信託金鑰;私密通信金鑰:列入信託金鑰.

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幾個重要密碼學觀念 信託金鑰Key Escrow System (KES)

‧ supply end-to-end privacy (symmetric cryptosystem)

‧ for investigation, the Law Enforcement Agency(LEA) can decrypt the ciphertext using key Escrow

‧ the balance between the privacy of people and investigation of government

‧ applied to PSTN network

‧ LEA fetches from two Trusted Center respectively (TC1,TC2)

‧ US government encourages users to use key Escrow

幾個重要密碼學觀念信託金鑰Key Escrow System (KES)

　‧ for investigation, the Law Enforcement Agency(LEA) can decrypt the ciphertext using key Escrow

　‧ the balance between the privacy of people and investigation of government

　‧ applied to PSTN network

　‧ LEA fetches from two Trusted Center respectively (TC1,TC2)

　‧ US government encourages users to use key Escrow