Is there an alternative to Electrum ? Is it possible by example to use a wallet that is validated by the appstore ? By example, I have seen Trust Wallet but maybe there are other best alternative ?
You can never be absolutely sure, being "validated" by a company doesn't mean there can't be bugs in it or malware on your system.
There are many alternatives, but Electrum is often recommended. It also comes preinstalled on Tails, which makes offline signing much easier.
1) It's interesting. I thought that Electrum and Ballet were the only wallet adapted for mini private keys.
Because as far as I have understood this is the "mini private key" that is a problem due to the lenght of the private key (under 30 character) ?
But by doing my research it is not clear which other wallet supports mini private keys.
2) Another question : Casascius Series 1 holograms use a 22-character variant of the minikey format, instead of 30 characters (
https://en.bitcoin.it/wiki/Mini_private_key_format). Is it also the case for version 2 Cascasius coin ? Or is it possible to proceed with a classic wallet for version 2 (because version 2 should be not with mini private key but private key)
3) Is it possible to give me some of the alternative wallets supporting mini private keys ? I have time to do some research and decide which wallet is the most appropriate for my case
Thanks