Is injective the same as one-to-one?

Could you please clarify for me the relationship between "injective" and "one-to-one" in mathematics? Are they interchangeable terms, or do they refer to slightly different concepts? I'm trying to understand the nuances of these terms in the context of functions and mappings. If they are not the same, could you explain the key differences between them? Additionally, how do these terms apply to functions in cryptography or finance, specifically in the realm of cryptocurrency? Thank you for your assistance in clarifying this matter.