rsa-oaep-encryption
Pure JavaScript implementation of encryption using the RSA-OAEP algorithm without relying on the Web Crypto API.
cryptico-js
Encryption/Decryption Library (AES/RSA, based on Cryptico)
jsrsasign
opensource free pure JavaScript cryptographic library supports RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp and CAdES and JSON Web Signature(JWS)/Token(JWT)/Key(JWK)