Petoron Seal Contracts (PSC)
Fully binary .psc contract format
TTL (time to live) built-in
Ed25519 participant signatures
Executed-flag to prevent reuse
External .sig signature support
Fully offline and P2P-ready
Compatible with Petoron Time Burn Cipher (PTBC)
https://github.com/01alekseev/PSC
Samizdat is a toolkit for Java for building Kerberos secured distributed, message-oriented applications. The toolkit contains base classes that simplifies the management of Kerberos login contexts as well as flexibly sign and seal messages between principals using the Java GSS API. The toolkit contains Transformation classes for Kerberizing JMS traffic as well as a super-lean HTTP based protocol stack that supports both Synchronous (RPC) and Asynchronous modalities.