AirGap, a self-custody Bitcoin and crypto wallet with a storage application, announced its latest version today. In update v3.11.0 AirGap implemented support for SegWit for Bitcoin (BTC), improved secret import and entropy collection via dice rolls.

Segregated Witness (SegWit) is an update to the Bitcoin protocol that changed the way data was stored on the blockchain. This update offers several benefits, including increased scalability, faster transaction times, and most importantly, lower transaction fees.

To use SegWit with AirGap, existing BTC users will need to generate a new address in AirGap Vault and send the money to the new SegWit address.

Other improvements include:

Entropy collection through dice and coin toss

Secret generation with dice toss and coin toss is a security feature to create secure memory content by using a specific sequence of inputs for entropy. This has the advantage that users can collect their entropy from the built-in device RNG (Random Number Generators) without digital help.

There is now an extended switch on the import page. Users can then choose to toss dice or toss coins to generate a reminder.

New secure function for importing mnemonic characters (built-in keyboard)

The AirGap team has now replaced the normal device keyboard with its own virtual keyboard.

This results in advantages such as:

  • The keyboard cannot record / save mnemonic (some device keyboards do this to check spelling and send whatever was typed to a server – this is not good for security). AirGap’s keyboard does not use any external dependencies and is included in the app.
  • The new keyboard can only import valid words from the BIP39 list. So there must be no more typing errors / double spaces etc.
  • The keyboard has BIP39 word completion for faster imports.
  • There’s a “scramble” button that shuffles the order of the letters on the keyboard and makes it safer when someone is looking over your shoulder.
  • There is a “hide” button that masks the reminder that has already been entered and increases security when someone looks over their shoulder.

BIP85 child mnemonic management

When generating a BIP85 child mnemonic, it is now possible to import this subordinate mnemonic directly into AirGap as a secret. So users don’t have to write them down before importing them.

“AirGap’s security features are constantly evolving, and in addition to the two new security features mentioned above, we also support the PSBT standard (BIP-174) which means the Vault is now compatible with other watch-only wallets currently in beta. “
– The AirGap team

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