Is it safe to share bitcoin address and signature generated from electrum wallet Some bitcoin airdrops are asking to prove ownership on bitcoin address by sharing signature. 

My question is if one shares bitcoin address and signature is there any risk of a attacker to compute the private key with this knowledge.

Note I am using electrum wallet to generate the signature
My question is if one shares bitcoin address and signature is there any risk of a attacker to compute the private key with this knowledge


While signing, the public key becomes exposed. The primary assumption is "It's impossible to find the private key which relates to a known public key", and this assumption isn't likely to be disproved (in other words, cracked) in the next 10 years.

The process of signing a message to claim airdrops is absolutely safe, as you can move your coins to a different address after claiming your airdrops.

The only risk is your privacy: They'll know how much money you have. If that's an issue, you can just mix your coins after you're done.