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- Recommit mistakently deleted encrypted invoicerequest flow diagram
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Matt David 2016-04-28 16:39:16 -07:00
parent 057591da8c
commit a79432ac99
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bip-0075.mediawiki
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@ -306,9 +306,11 @@ For the following we assume the Sender already knows the Receiver's public key,
===ECDH Point Generation and AES-256 (GCM Mode) Setup===
'''NOTE''': AES-256-GCM is used because it provides authenticated encryption facilities, thus negating the need for a separate message hash for authentication.
* Generate the '''secret point''' using [https://en.wikipedia.org/wiki/Elliptic_curve_Diffie–Hellman ECDH] using the local entity's private key and the remote entity's public key as inputs.
* Initialize [http://csrc.nist.gov/publications/nistpubs/800-90A/SP800-90A.pdf HMAC_DRBG]
** Use '''SHA256(secret point's X value)''' for Entropy
** Use the given message's '''nonce''' field for Nonce
* Initialize AES-256 in GCM Mode
** Use HMAC_DRBG.GENERATE(32) as the Encryption Key (256 bits)
** Use HMAC_DRBG.GENERATE(12) as the Initialization Vector (IV) (96 bits)

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bip-0075/mobile-sf-encrypted-ir-without-payment.png Executable file
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