The Seismic Transaction

Seismic extends Ethereum's transaction model with encrypted calldata and authenticated reads. This section covers the two core mechanisms:

• Tx Lifecycle — How a Seismic transaction is constructed, encrypted, sent, decrypted, and executed. Covers key management, the SeismicElements metadata fields, AES encryption with AEAD, node-side decryption, and shielded storage via CLOAD/CSTORE.

• Signed Reads — How users make authenticated eth_call requests that prove msg.sender identity. Covers the motivation (preventing from-address spoofing), how signed reads are sent and validated, and the signed_read field that prevents replay as write transactions.