Is injective and one one same?

Could you please clarify for me if the terms "injective" and "one-to-one" are interchangeable in mathematical contexts? I understand that both describe functions that map each element in the domain to a unique element in the codomain, but I'm not sure if they always mean the same thing. Is there a subtle difference between the two that I should be aware of? Additionally, how do these concepts relate to the field of cryptography and the security of blockchain transactions?