Oguz Crypto — Encrypt & Decrypt

Shift

Input

Output Process

Key: 26-letter permutation of A–Z (e.g. ZYXW…CBA)

Input

Output Process

Key

Input

Output Process

Key

Input

Output Process

Matrix size (n×n) Message

Key matrix (0–25 per cell)

Input

Output Process

One-time key (letters only, at least as long as message — never repeated)

Input

Output Process

Rails

Input

Output Process

Key size Rounds Calculate till

Key matrix (4×4 bytes, hex 00–FF per cell)

Input block matrix (4×4 bytes, hex 00–FF per cell — first 16 bytes of plaintext)

Additional input (UTF-8, appended after the 16-byte block above)

Output (hex) Process

Cipher Mode Key (string; derived to required length)

Input

Output (base64) Process

Key (128-bit derived from string)

Input

Output (base64) Process

Key (16-byte derived)

Input

Output (base64) Process

P (prime, or list of candidates) Q (prime, or list of candidates) E (optional — leave blank for auto)

Enter P and Q — everything else is computed: N = P × Q, φ(N) = (P−1)(Q−1), and D = E⁻¹ mod φ(N). You may supply a comma-separated list of candidates for P or Q; the first prime in each list is used (non-primes are skipped). If E is left blank, the smallest valid E (1 < E < φ, gcd(E, φ) = 1, E ∉ {P, Q}) is picked automatically. Letters: A=1, B=2, …, Z=26.

Input

Output Process

p (prime, hex) — leave empty for demo p=23 g (generator, hex) — leave empty for demo g=5 Your private value (hex) Other party's public value (hex)

Shared secret (hex) Process

Key: public:… for encrypt, private:… for decrypt. Or generate below.

Input

Output Process

Given (public): p (prime), e1 (generator, 1 < e1 < p), and d (private key).
Auto-derived 3rd public key: e2 = e1^d mod p — shown live below.
Encrypt: C1 = e1^r mod p, C2 = PT · e2^r mod p | Decrypt: s = C1^d mod p, PT = C2 · s⁻¹ mod p. Letters: A=1…Z=26.

p (prime) e1 (generator, 1 < e1 < p) d (private key) r (random integer, optional)

e2 = e1^d mod p —

Input

Output Process

SHA-256 is a one-way hash function — it produces a fixed 256-bit (64 hex char) digest. There is no key and no decryption.

Input

SHA-256 digest (hex) Process