The Codebreaker challenges may include code from the following sources:

• Busybox - license
• cryptsetup/cryptsetup - license
• dateutil - license
• github.com/golang/snappy - license
• github.com/google/uuid - license
• github.com/kelseyhightower/envconfig - license
• github.com/klauspost/compress - license
• github.com/klauspost/compress/internal/snapref - license
• github.com/klauspost/compress/zstd/internal/xxhash - license
• github.com/montanaflynn/stats - license
• github.com/shirou/gopsutil - license
• github.com/tklauser/go-sysconf - license
• github.com/tklauser/numcpus - license
• github.com/xdg-go/pbkdf2 - license
• github.com/xdg-go/scram - license
• github.com/xdg-go/stringprep - license
• github.com/youmark/pkcs8 - license
• The Go programming language - license
• Go Cryptography - license
• go-sqlite3 - license
• go.mongodb.org/mongo-driver - license
• golang-jwt - license
• golang.org/x/crypto - license
• golang.org/x/sync - license
• golang.org/x/sys/unix - license
• golang.org/x/text - license
• gopkg.in/yaml.v2 - license
• hyperrealm/libconfig - license
• intel/tinycrypt - license
• json-c/json-c - license
• libfaketime - license
• lvmteam/lvm2 - license
• mkj/dropbear - license
• OpenSSH - license
• OpenSSL - license
• pytz - license
• qemu/qemu - license
• rpm-software-management/popt - license
• u-boot/u-boot - license
• util-linux/util-linux - license