Ravi Sir's Cards › AWS
Why store a hash of the OTP?
What is a VPC: your own private network inside one AWS Region, example ThreeTierVpc 10.0.0.0/16.
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What this card says
What it is
A database leak must not reveal usable login codes.
Why it matters
Hashes are one-way; verification re-hashes the user input and compares.
How / example
sha256(f"{dest}:{otp}") stored with expiresAt; never log the raw digits.