BR-EDR-Security蓝牙安全机制
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BR/EDR Sec1u5rity
Authentication Stage1(Passkey Entry Protocol)
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BR/EDR Sec1u6rity
Authentication Stage2
h
BR/EDR Sec1u7rity
Link key calculation
LMP Authentication and Encryption
Kinit
if one device sends an LMP_unit_key PDU and the other device sends LMP_comb_key, the unit key will be the link key.
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BR/EDR Secu8rity
Secure Simple Pairing
Kinit
if both devices send an LMP_comb_key PDU, the link key shall be calculated as described in [Part H] Section 3.h2 on page 1312.
BR/EDR Secu7rity
Creation of the Link Key(Legacy)
K =K master init
Kinit
if both devices send an LMP_unit_key PDU, the master's unit key will be the link key.
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BR/EDR Secu6rity
Creation of the Link Key(Legacy)
BR/EDR Security
Solin Guo
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1
Security Overview
建立基带连接
ቤተ መጻሕፍቲ ባይዱ
传统认证
SSP
Kmaster
Ka
Kab 数字比对
密码输入
OOB
Kc
SAFER+
Encryption(E0)
Link key
AES-key
HMAC-SHA256
AES-CCM
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BR/EDR Secu2rity
Numeric Comparison Protocol
Secure Simple Pairing
Passkey Entry Protocol
Out of Band Protocol
Authentication(Device)
Link Key
Authentication(Link key)
Kc
AES-key
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BR/EDR Secu9rity
Secure Simple Pairing
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BR/EDR Sec1u0rity
Secure Simple Pairing(Public Key Exchange)
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BR/EDR Sec1u1rity
Secure Simple Pairing(Authentication Stage1)
Authentication(Device)
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BR/EDR Sec1u3rity
Authentication Stage1(Numeric Comparison Protocol)
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BR/EDR Sec1u4rity
Authentication Stage1(Out of Band Protocol)
E0
AES-CCM
h
BR/EDR Sec1u2rity
Secure Simple Pairing(Authentication Stage1)
Numeric Comparison Protocol
Secure Simple Pairing
Passkey Entry Protocol
Out of Band Protocol
Authentication(Link Key)
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BR/EDR Secu3rity
Encryption(E0)
Kc address clock RAND
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BR/EDR Secu4rity
Creation of the Link Key(Legacy)
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BR/EDR Secu5rity
Creation of the Link Key(Legacy)
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BR/EDR Sec1u8rity
Secure Connections
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BR/EDR Sec1u9rity
Message Sequence Charts(SSP)
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BR/EDR Sec2u0rity
Message Sequence Charts(SSP)
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BR/EDR Sec2u1rity
There are five phases of Secure Simple Pairing: • Phase 1: Public key exchange • Phase 2: Authentication Stage 1 • Phase 3: Authentication Stage 2 • Phase 4: Link key calculation • Phase 5: LMP Authentication and Encryption