Submariner breached the Official Secrets Act
Devenney pleaded guilty at the Old Bailey to gathering details of encryption programmes in breach of the Official Secrets Act.
He also admitted a charge of misconduct in a public office in relation to a meeting with two people he thought were from the secret service of another state.
Submariner jailed over offer to pass on British secrets
A submariner has been jailed for eight years for trying to disclose the secret movements of British nuclear submarines to "Russian spies".
Submariner admits collecting top secret naval codes
Submariner Edward Devenney has admitted collecting top secret naval codes before meeting two men he believed were Russian spies