Encryption that
never leaves your phone.
加密，
从不离开你的手机。
Sealboard is a third-party iOS keyboard that turns your text into standard RSA-2048 ciphertext — all locally, no servers, no accounts.
Sealboard 是一个第三方 iOS 键盘 — 把你输入的文字就地变成标准的 RSA-2048 密文。本地完成，无服务器，无注册。
Standard RSA-2048
标准 RSA-2048
PKCS#1 v1.5 padding. Interoperable with OpenSSL, WebCrypto, and most online RSA tools.
PKCS#1 v1.5 填充。与 OpenSSL、WebCrypto 等标准工具互通。
Stays on device
仅在本机
No accounts, no servers. Your private key never leaves the device — and there's no network code to leak it.
无注册、无服务器。私钥从不离开设备 — 我们的代码里就没有任何联网逻辑。
25 languages
25 种语言
QWERTY / AZERTY / QWERTZ / Cyrillic / Greek / Hebrew / Arabic / Chinese pinyin IME and more.
QWERTY / AZERTY / QWERTZ / 西里尔 / 希腊 / 希伯来 / 阿拉伯 / 中文拼音 IME 等。
12-word recovery
12 词助记词
Your account is derived from a 12-word mnemonic. Lose your phone — restore on a new one with the same words.
账户由 12 个英文单词派生。换手机用同样的助记词就能恢复。