Building Blocks

API

zenroom

Android

iOS

Remote Storage - ECIES colendi

Android

iOS

API

React Native - DisposableIdentityModule - Android

Twinds SDK - Kotlin Multiplatform

Remote Storage

• Gaia Protocol

Local Storage

• Keys
• Vault
• Settings
• SecuredSettings

zenroom

• multiplatform
• various scenarios: ecdh, secshare, w3c

Cryptography

Key generation, zenroom

• deterministic, seed from user

Shamir's secret sharing, zenroom

• 3 out of 5

Gaia file encryption, colendi

• private key derived from seed from user
• secp256k1 bouncycastle implementation

Proof of identity relationship, zenroom

• double signature

Signed JWT, uport

• sha256
• komputing, spongycastle implementaiton

Derivation with zenroom

seed + path to create hmac (sha512 of 2048 bit)

key pair with hmac + hmac

BIP39 mnemonic / 24 words

           -> seed with salt

BIP32 derivation for main DIDs and disposable DIDs

           -> key pair

Key Derivation

Derivation Proof Credential (Verifiable Credential)

Linked Data Signature by disposable DI of claim, then

Linked Data Signature by main DID of signed claim

Proof of Identity Relationship

zenroom

scenario: web3 + ecdh

uport

sha256 + spongycastle

3 of 5

Shamir's Secret Sharing

zenroom

scenario: secshare

3 times 22 bytes to share 64 byte secret