seccure-encrypt: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/seccure-encrypt - from package: seccure

You may install the required package with command apt-get install {package}
Error in other languages:
seccure-encrypt: bevel nie gevind nie
seccure-encrypt: comandă negăsită
seccure-encrypt: comando não encontrado
seccure-encrypt: commande introuvable
seccure-encrypt: command not found
seccure-encrypt: käsku ei ole
seccure-encrypt: không tìm thấy lệnh
seccure-encrypt: komanda nerasta
seccure-encrypt: Kommando nicht gefunden.
seccure-encrypt: kommandot finns inte
seccure-encrypt: komut yok
seccure-encrypt: nie znaleziono polecenia
seccure-encrypt: níor aimsíodh an t-ordú
seccure-encrypt: no se encontró la orden
seccure-encrypt: no s'ha trobat l'ordre
seccure-encrypt: opdracht niet gevonden
seccure-encrypt: parancs nem található
seccure-encrypt: perintah tidak ditemukan
seccure-encrypt: príkaz nenájdený
seccure-encrypt: příkaz nenalezen
seccure-encrypt: команда не найдена
seccure-encrypt: командата не е открита
seccure-encrypt: 命令找不到
seccure-encrypt: コマンドが見つかりません