👉 In computer science and cryptography, a "precopy" is a technique used to encrypt data by repeatedly copying it into a buffer, then writing that buffer into the original file. This process ensures that only one copy of the data can be accessed during decryption. Precopying is typically used in systems like Secure Shell (SSH) or Transport Layer Security (TLS). In these protocols, precopying is used to encrypt sensitive information before transmission over a network, ensuring that it cannot be intercepted by an