Cryptography
Lessons filed under Cryptography.
Cryptography Hashing, encoding and encryption are three different things Hashing is one way, encoding is not secret, and encryption needs a key. See the difference in three short commands.
Cryptography Symmetric and asymmetric keys One shared secret, or a pair of related keys? See how each works, and when to reach for which.
Cryptography TLS and the chain of trust The padlock means more than encryption. See what a certificate says, and who vouches for it.
Cryptography Signing and verifying a file A signature proves a file has not changed and came from the key holder. Sign one and check one with gpg.
Cryptography Common crypto mistakes Five mistakes that keep turning up, and how to spot each one before it costs you.