PBKDF2 Encrypt

Key
Salt
Key Size
Iterations

PBKDF2 Encryption is a specific type of Password-Based Key Derivation Function Encryption (PBKDF Encryption) that uses a pseudorandom function, such as hash-based message authentication code (HMAC), to generate a derived key from a password or a passphrase. PBKDF2 Encryption adds a salt (a random value) and an iteration count (a number of times to repeat the process) to the password or passphrase before applying the pseudorandom function. The derived key can then be used as a cryptographic key for encryption and decryption of data using an encryption algorithm, such as AES. PBKDF2 Encryption is designed to increase the difficulty and time required for attackers to crack the password or the key by brute-force attacks

Four-Square Cipher encrypts pairs of letters (like playfair), which makes it significantly stronger than substitution ciphers etc. since frequency analysis becomes much more difficult.

Four-Square Cipher

Four-Square Cipher encrypts pairs of letters (like playfair), which makes it significantly stronger than substitution ciphers etc. since frequency analysis becomes much more difficult.
Vernam Cipher (also known as the one-time pad (OTP)) is an encryption technique that cannot be cracked, but requires the use of a one-time pre-shared key the same size as, or longer than, the message being sent.

Vernam Cipher

Vernam Cipher (also known as the one-time pad (OTP)) is an encryption technique that cannot be cracked, but requires the use of a one-time pre-shared key the same size as, or longer than, the message being sent.
XOR Cipher is a type of additive cipher.

XOR Cipher

XOR Cipher is a type of additive cipher.
Columnar Transposition Cipher is a fairly simple, easy to implement cipher. It is a transposition cipher that follows a simple rule for mixing up the characters in the plaintext to form the ciphertext.

Columnar Transposition Cipher

Columnar Transposition Cipher is a fairly simple, easy to implement cipher. It is a transposition cipher that follows a simple rule for mixing up the characters in the plaintext to form the ciphertext.