RSI partnered with a client to support the launch of a new payment system that required a secure Single Sign On token. The system needed identity verification before users could enter personally identifiable information inside a payment iframe. This approach allowed users to authenticate once while maintaining strong security controls across connected platforms. RSI designed and implemented an encryption strategy to protect the SSO token throughout its entire lifecycle.
Understanding the SSO Challenge
Single Sign On allows users to access multiple systems without logging in repeatedly. That convenience introduces risk when sensitive data moves between applications. The payment platform required encrypted API requests that included an SSO token to validate user identity. Encryption needed to protect the token during transit and storage without affecting the user experience. RSI focused on security first while keeping the process seamless for end users.
Secure Key Management Strategy
Strong encryption starts with proper key management. The encryption and decryption process depends entirely on the safety of the encryption key. A compromised key would expose the token and allow unauthorized system access. RSI stored all encryption keys in secured, encrypted locations and restricted access through verifiable credentials only. This approach ensured confidentiality and availability without increasing operational risk.
Why Key Security Matters
Keys control access to encrypted data. Strong protections prevent misuse and support compliance requirements. RSI treated key protection as a core security function rather than a supporting task.
Selecting a Proven Encryption Algorithm
After securing the encryption keys, RSI selected a robust encryption algorithm. The team used a Rijndael cipher with customized padding, buffering, and encryption modes. This cipher resists known attack methods and provides strong cryptographic protection for SSO tokens. Proper configuration ensured the token data stayed obscured while remaining usable by authorized systems.
Encryption That Meets Modern Standards
Rijndael offers a balance of strength, reliability, and flexibility. RSI leveraged this cipher to protect sensitive identity data without slowing system performance.
Secure Transmission and User Verification
RSI encrypted the SSO token and request payload before sending them to the integration platform. The receiving system verified the user identity and displayed the payment interface securely inside the iframe. After completion, the system redirected users back to their account using a postback URL. This step confirmed that the tokenized payment data stored successfully in the payment system.
Seamless User Experience
The entire encryption and verification process occurred behind the scenes. Users interacted with a smooth and intuitive payment flow without exposure to security complexity. RSI balanced strong protection with ease of use to support trust and adoption.
Conclusion
SSO token encryption requires careful planning, secure key handling, and reliable cryptographic methods. RSI addressed each challenge to deliver a secure and user friendly authentication flow. This implementation protected sensitive payment data while preserving a seamless experience across integrated systems.