Siemens Aktiengesellschaft

Antonio Vaira

Fabrizio De Santis

A signing system for validating stateful hash-based digital signatures includes a signing device, a logging device and a verifying device, wherein each signing device is configured to receive data, generate a hash-based digital signature including a one-time signature, generate a one-time public key, send the generated one-time public key, send the hash-based digital signature, the verifying device is configured to generate a validation one-time public key, send the validation one-time public key, and the logging device is configured to store the generated one-time public key, receive a validation one-time public key, compare the validation one-time public key with all one-time public keys, provide a validation feedback signal, if the validation one-time public key coincides with exactly one stored one-time private key, and provide a warning feedback signal, if the validation one-time public key does not coincide with exactly one stored one-time private key.

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Munich, Germany

Antonio Vaira