IRONDOTS CHAT vs MessageSeal

IRONDOTS CHAT allows you to send and receive encrypted text messages through sound waves. The app does not connect to the internet and all encrypted messages are only transmitted by sound or ultrasound. To receive incoming messages, you only need to allow access to your device's microphone. THE IRONDOTSCHAT PRINCIPLE IRONDOTSCHAT protects your messages from access by hackers, companies and governments through physical separation and end-to-end encryption. The app can be used completely anonymously (without registration; without providing a phone number or email address). IRONDOTS is based on the "box" model of the open source NaCl Networking and Cryptography Library to transmit messages with a maximum length of 40 characters encrypted through sound waves. COMMUNICATE WITHOUT TRACES IRONDOTSCHAT is designed for offline operation, without an internet connection. We have simply not implemented the possibility to communicate with the Internet or other devices. Your secret certificate is stored encrypted with your password on the mobile phone/tablet. All this prevents the collection and misuse of personal information. IRONDOTS is fully compliant with the European Data Protection Act (DPA). BEST ENCRYPTION All messages are always end-to-end encrypted. You can be sure that no one except the intended recipient can read your messages. The key pair is generated and stored encrypted directly on your device. 256-bit long asymmetric keys are used, which are generated using elliptic curve cryptography (Curve25519). This asymmetric key is used to obtain a unique 256-bit symmetric key for each message sent. NO ADS, NO TRACKERS, NO COOKIES IRONDOTSCHAT is not financed by advertising and does not collect user data. SUPPORT / CONTACT Support: security@irondots.com

MessageSeal helps you protect text before sharing it through the apps you already use. Encrypt a message for selected recipients, or sign readable text so others can check its signature. PROTECT AND SHARE Write your message in Compose, choose Encrypt or Sign, and share the result through Messages, Mail, or another app. Use Open to decrypt encrypted messages or verify signed text. The included Messages extension lets you encrypt, sign, share public identities, and open compatible protected text inside Messages. YOUR KEYS, YOUR DEVICE Create your own identities in Keys and save other people's public identities in People. Private keys are stored in the device Keychain. Manage multiple identities, create password-protected encrypted backups, and use dedicated temporary identities for one-off exchanges. EXCHANGE PUBLIC IDENTITIES NEARBY When two devices are together, use Nearby Exchange to exchange public identities and compare a matching safety code before saving. Nearby Exchange runs in the main app while its screen is open. LOCAL BY DESIGN Encryption, signing, decryption, and verification happen on your device. No account, advertising, analytics, or cloud sync. Optional device authentication helps protect access to your keys and opened messages. A guided tour and Help & Security guide explain each step. The current crypto profile uses Apple's XWing HPKE to wrap message keys, AES-256-GCM to protect message text, and hybrid ML-DSA87 + P521 signatures. MessageSeal protects text contents. The app you use to transport a message may still retain copies and transport metadata. Signed text remains readable. A valid signature or matching safety code does not establish a person's name by itself; confirm public identities through a trusted channel before relying on them. Requires iOS or iPadOS 26.0 or later.