Is encryption really needed for blockchain to work?

Is encryption really needed for blockchain to work?

Is it right to say that Bitcoin and other blockchains do not use encryption? I read somewhere that blockchains rely on digital signatures and hash functions but not on encryption, and that encryption is only used on the client side (e.g. crypto wallets)… But it seems that encryption is also part of these other cryptographic techniques… So I’m trying to clarify whether blockchain technology needs encryption or not. Thank you!

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