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Hva er tekst-kryptering?

Tekst-kryptering konverterer lesbar tekst til kryptert tekst som kun kan dekrypteres av noen med riktig nøkkel. Dette verktøyet bruker AES-256-GCM, en sikker krypteringsstandard som gir konfidensialitet og autentisitet.

Supported Algorithms:

Symmetric Encryption (AES):

• AES-GCM (Recommended): Provides authenticated encryption with associated data (AEAD). Most secure for general use.
• AES-CBC: Traditional block cipher mode. Requires padding.
• AES-CTR: Counter mode. Converts block cipher to stream cipher.

Asymmetric Encryption (RSA):

• RSA-OAEP: Uses public key for encryption. Limited to ~190 characters due to key size constraints. Use for encrypting small data or symmetric keys.

Output Format:

For AES algorithms: JSON with base64-encoded components

{"iv": "base64_encoded_iv", "data": "base64_encoded_ciphertext"}

For RSA: Base64-encoded ciphertext only (no IV needed)

base64_encoded_ciphertext

This format is compatible with most encryption/decryption tools and libraries.

Hvordan bruke

1. Skriv inn teksten du vil kryptere.

2. Oppgi et passord.

3. Klikk på "Krypter".

4. Kopier den krypterte teksten og lagre den trygt.

5. Copy the encrypted result and keep your secret key safe - you'll need it to decrypt the data later.

6. Use the eye icon to show/hide your secret key for security.

Additional Tips:

• For AES: The secret key is auto-generated or you can provide your own (minimum 32 characters)
• For RSA: You need a public key in PEM format. Generate one using the Key Generator tool or OpenSSL
• RSA limitations: Can only encrypt short text (~190 characters). For longer texts, use AES algorithms
• Output encoding: Base64 is used for compatibility with other encryption tools and libraries

Sikkerhetsmerknader

Dette verktøyet bruker nettleserens innebygde Web Crypto API for sterk kryptering. AES-GCM gir autentisert kryptering med tilknyttede data (AEAD), noe som gjør det til det anbefalte valget for de fleste applikasjoner. AES-CBC gir tradisjonell blokkchiffer-kryptering. Hold alltid din hemmelige nøkkel sikker og del den aldri offentlig. Den krypterte utgangen inkluderer både initialiseringsvektoren (IV) og krypterte data i JSON-format.

Important Notes:

• All encryption happens locally in your browser using the Web Crypto API
• The IV (Initialization Vector) is automatically generated for each encryption and must be saved with the ciphertext
• For RSA encryption, you encrypt with a public key; decryption requires the corresponding private key
• Store your secret keys securely - if lost, encrypted data cannot be recovered
• Base64 encoding makes the output portable and compatible with most tools and programming languages

Krypter tekst sikkert med AES-256-GCM direkte i nettleseren. Ingen data sendes til servere.

Keywords: tekst-kryptering, AES-256, krypter melding, sikker kryptering