Mountain View, CA | December 13, 2022 09:10 AM Eastern Standard Time

 , a startup launching a Trusted Execution Environment in space, has released its first Cryptosim Software. Designed for developers, Cryptosim combines an API tutorial with a satellite trajectory simulation. This will enable developers to get a feel for how they can interact with software on Cryptosat’s low earth orbit (LEO) satellites once in space.

Cryptosat’s tamper-proof root-of-trust is achieved through complete device isolation by launching LEO satellites. Running code on an orbiting satellite is significantly different from running code on AWS. To reduce the learning curve, Cryptosim intends to walk developers through the process for interacting with software installed on the satellite.

The simulator UI includes a tutorial that describes the API functions supported by Cryptosat and a map that shows the satellite trajectory. There is also a JavaScript console where the user can programmatically try the API and interact with the simulated satellite to request its status, sign messages, request randomness, generate Delay-Encryption key-pairs and more.

The Cryptosim API teaches developers about the asynchronous manner in which the satellite software works. It is designed this way to account for the fact that satellites are not visible to ground stations 100% of the time.

Functions that can be called using the current build of Cryptosim include:

• Public randomness (Random Beacon)
• Private randomness: where a user requests random bits to be encrypted to a public key they provide in the request
• Retrieving a signed timestamp: used by applications that require a trusted source of time or smart contracts that need to ensure a certain amount of time has passed in the real world
• Delay encryption: where a satellite generates a cryptographic key-pair and publishes the public key. The private key is not released before a specified amount of time has passed, preventing premature decryption
• Signing any data in space

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Cryptosat is inviting developers to trial its API and acclimatize themselves to the capabilities of its LEO satellites. It is encouraging blockchain teams to propose new use cases for its product, over and above the multiple applications that have already been envisioned.

Using its own satellites built from the ground up, Cryptosat can guarantee that no third party has interfered with the compute environment prior to its being launched into orbit. This provides a unique guarantee that not even nation-state actors can tamper with the operations that are carried aboard the satellite.

About Cryptosat

Cryptosat builds and launches satellites that power blockchain and cryptographic protocols. Satellites are physically inaccessible and can serve as the most secure root-of-trust that guarantees the confidentiality and integrity of sensitive computations and data. Such tamper-proof satellites can serve numerous use-cases including transaction signing, trusted setups for cryptographic schemes, a randomness oracle, time-oracle (VDF) and more.

Founded by Stanford PhD alumni and second time founders Yonatan Winetraub and Yan Michalevsky, Cryptosat’s team have a background in aerospace engineering, applied security, and cryptography. In 2018, they published the SpaceTEE paper that first introduced the idea of using small satellites for protecting sensitive cryptographic operations and protocols. In May 2022, their first satellite, Crypto1, was launched into orbit. In March 2022, the team completed an experiment onboard the International Space Station.

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